Prince William and Prince Harry have paid tribute to their late mother Diana, Princess of Wales.
The two royals have honoured their mother's charitable legacy in the foreword of a book which celebrates the 15th anniversary of the Diana Princess of Wales Memorial Award - a charitable organisation that was set up in 1999 to support and encourage children and teenagers.
According to the Daily Mail newspaper, the princes wrote: "We believe, when encouraged and supported, that young people have the ability to change society for the better. We know that our mother - in whose memory this award was established - felt the same and would be proud of its achievements to date.
"Having met young people working with the charity in Newcastle and in London, we were struck in both cases by their deep and lasting sense of social responsibility.
"These young people were working hard to tackle the social issues that affected them - such as bullying or social exclusion - the Diana Award empowered them to do more."
The charity was established two years after Diana's tragic death in 1997. Since its inception the Diana Princess of Wales Memorial Award has helped over 40,000 young people.
This year, Ellie Louise Harris-Beard was awarded the Diana Champion Fundraiser Award for setting up the charity Cords4Life.
After finding out that she was to be honoured, Ellie said: "I was quite shocked. I didn't know what to say. It's exciting."

John Barrowman was awarded an MBE by Princess Anne.
The 'Torchwood' actor was honoured with an MBE by the Princess Royal during an investiture ceremony at Buckingham Palace yesterday (14.10.14).
The 47-year-old screen and stage actor wore a traditional tartan kilt to honour his Scottish roots as he accepted his medal from Princess Anne.
He later tweeted: "It was so great to have Scott and my Mum and Dad to share the day. My parents were just beaming. (sic)"
Sporting stars, Kelly Gallagher, a visually impaired skier and Charlotte Evans, her sighted partner, were also honoured at the event for their services to sport after their win at the 2014 Paralympic Games.
After accepting her MBE from the Princess Royal, Kelly said: "We've been really lucky to win a Paralympic medal but to be honoured in this way is incredible."
Acclaimed golfer Laura Davies - who has previously been awarded a CBE and MBE - was also made a Dame.
Elsewhere in the palace, the Queen greeted Marguerite Pindling, the Governor-General of the Bahamas.
The 82-year-old Governor-General was invested with the Insignia of a Dame Grand Cross of the Most Distinguished Order of St Michael and St George.
Angelina Jolie was made an honorary Dame Grand Cross of the Most Distinguished Order of St Michael and St George at a ceremony on Friday (10.10.14) in recognition of her humanitarian work.

Prince William asked a nurse for advice on how to get Prince George to behave.
Sue Jones, a nurse who works for Abertawe Bro Morgannwg University Health Board, was presented an MBE by Prince William as part of the Queen's Birthday Honours List in June.
She has now revealed that the royal - who is currently expecting a second child with his wife Catherine, Duchess of Cambridge - asked for some advice on how to tame his son, Prince George.
Speaking to the South Wales Evening Post, Sue said: "I went to Windsor Castle to receive it from Prince William. Ii was delighted. He was so lovely.
"We had a good chat. He asked me about my work and even said, 'Perhaps you could give me some advice about getting my young son to do what he should do.
"I told him to treasure ever moment because he won't be a baby for very long."
Sue was being honoured in recognition of her work during the 2013 measles outbreak. The nurse organised an MMR vaccination programme for various schools in the Swansea and Neath Port Talbot areas, protecting hundreds of children from the virus.
With regard to her MBE, Sue added: "It was a real honour for me. I'm still shell-shocked. I was thrilled to have been nominated but to get it was absolutely fantastic."

Jay James only developed an interest in music because of a "drunken bet".
The 'X Factor' contestant - who only went to his first gig six years ago - bought his first guitar during a drinking session with his Navy pals and was stunned at the attention it got him from girls.
He explained: "I said to one of the guys that if he came to the gym with me I'd do something in return - and at that moment we walked past a music shop so I said I'd learn the guitar.
"So I bought it for £35 and christened it 'Lemar the guitar'.
"We took it out with us for the rest of the day on the lash and it was amazing, the girls were flocking over.
"Unfortunately, they kept asking me to play it so I had to break a string as an excuse not to give a demonstration.
"Then I woke up hungover the next morning and Lemar was on the floor and that's where it stayed because I really had no intention of learning guitar, it was just a drunken laugh."
Jay then returned to the instrument after falling into depression after suffering a knee injury and seeing his best friend drafted to Iraq.
He explained to The Sun newspaper: "I wasn't able to do my job while I was injured and with no focus, I found it hard.
"In the military, you're trained to suppress your emotions, so it was hard, especially with my mate being away in a dangerous situation.
"I knew I needed a new focus so I got my guitar restrung, bought a computer so I could go online and taught myself to play chords. I never even did karaoke before so I wasn't a singer but I began humming along to keep time and eventually singing and thought, 'Oh actually, I'm alright at this.' And that motivated me."

Amanda Holden's friends think 'This Morning' has become "a lot naughtier" since she started co-hosting the show.
The 43-year-old star has been filling in for regular co-presenter Holly Willoughby - who is on maternity leave - and joked her pals have noticed a change in the content since she joined the programme, on which she had to interview Edward Smith, who has had sex with more than 700 cars, live on yesterday's (14.10.14) show.
Speaking at Warner Bros. Studio Tour London - The Making of Harry Potter in Watford, south east England, for the launch of the first, new permanent feature devoted to the Dark Arts last night (14.10.14), she exclusively told BANG Showbiz: "Some of my friends have said to me they think the content is a lot naughtier since I've been on the show. But I don't book the guests!"
Amanda and her 'This Morning' co-presenter Phillip Schofield managed to keep their composure during the bizarre segment, during which she said to Edward: "So, you lost your virginity to a Volkswagen Beetle?"
Phillip also sparked a comical reaction from several Twitter users when he asked the car lover what he would do if his beloved Beetle was ever "rear-ended".
Amanda explained last night: "I never know if the camera is on me or not when we do those segments so I was trying to keep a straight face. It was tough when Philip said "rear-ended" though.
"But afterwards we all said we thought Edward was quite endearing."
Amanda had another bizarre encounter last night when she literally came face-to-face with a 12ft reticulated python, which was studied by the 'Harry Potter' Visual Effects Department as a basis for some of Voldemort's snake Nagini's movements.
The blonde beauty put on a brave face as the serpent slithered around her head while she posed for pictures on the magical set of the film franchise.
Warner Bros. Studio Tour London - The Making of Harry Potter - unveiled the first, new permanent feature devoted to the Dark Arts, which is open now.
The new permanent Dark Arts section will be launched with a two-week event highlighting the Dark Arts from Friday (17.10.14) to November 3 and all extra activities are included in the ticket price. www.wbstudiotour.co.uk

Danny Dyer wants to make late night 'EastEnders' specials.
The 37-year-old actor - who is famous for playing foul-mouthed hard men in films such as 'The Football Factory' - stars as Queen Vic landlord Mick Carter in the BBC One soap and has confessed he wishes his character could swear.
He said: "I'd love to push the boundaries. The show would be perfect if they'd let us do some swearing."
However, despite hoping for more gritty scenes, Danny admits he's not sure if viewers could handle it if he stripped off for the cameras.
He added to the Daily Mirror newspaper: "I'd frighten people, the size of me."
'EastEnders' previously tried out the idea of a younger teenage-focused spin-off titled 'EastEnders: E20', which aired online between 2010 and 2011.
Introducing a late night edition of the soap would see them following in the footsteps of Channel 4's 'Hollyoaks', which has a week of 'Hollyoaks Later' episodes annually to allow for more sexual content, edgier storylines and stronger language.
Meanwhile, Danny could be set to use some of his previous acting skills when his character Mick discovers his wife Linda (Kellie Bright) has been raped by his brother Dean Wicks (Matt Di Angelo) - who he believes at the time is his nephew.
'EastEnders' boss Dominic Treadwell-Collins told the Daily Star newspaper: "Mick has a temper. He will find out, there's no doubt about that.
"This is going to be the start of what is going to be a very epic story for the Carters."

'Coronation Street' stars are reportedly fighting with bosses over their salaries.
Youngsters on the ITV soap have been left reeling after discovering veteran stars are being paid up to six times as much for their role on the cobbles.
It is thought newcomers receive around £40,000 a year to appear on the show, while actors including Kym Marsh, Bill Roache and Michael Le Vell are on an estimated £100,000 with even bigger stars raking in around £250,000 per year.
However, show bosses are said to be unconcerned with their complaints as they know there are countless actors who would jump at the chance to replace them.
A source told The Sun newspaper: "The kids are on pittance compared with the older stars, and do a lot more episodes.
"Bosses don't care because they know there's plenty of other young kids eager to join. There is a lot of unhappiness.
"The show also recently introduced a system to dock the wages of people who bring the show into disrepute, causing a lot of ill-feeling."
The pay gap may even be responsible for recent departures from the soap - which include Michelle Keegan, Charlie Condou and Chris Gascoyne - as stars are becoming aware they can earn more money elsewhere.
The source said: "The new stars are trapped on contracts that mean they will never earn the big money and yet are prevented from boosting their income in different ways.
"They are allowed to do personal appearances in clubs or shops but can't be the face of a make-up or clothes range.
"The soap doesn't pay the wages to make people want to stay for life. More experienced actors know they can earn the same doing other things, while working about half as hard."

Russell Brand "got blessed" by a priest yesterday (14.10.14).
The 39-year-old comedian met the church leader in the lobby of Sirius XM radio and says the experience "felt like something".
He said: "I ran into a priest and a nun in the corridor. Never miss an opportunity for a blessing from someone who's dedicated their life to the lord.
"I got blessed and it felt like something."
Russell was taping an interview with the station's Ron Bennington, in which he spoke of his ideas for a modern society and said "altruism, meditation, reflection and transcendence" will save us from a "sugarcoated culture" in which we're eating bad food and "listening to bad ideas all the time."
He added in the interview, which will air on October 24: "I want a society where the people that are poorest and most vulnerable are taken care of.
"People that are ordinary and working get a decent life. And the economic elite, that currently are on some edifice of irreproachability, on some plinth of inaccessibility, contribute to our society."
The 'Arthur' star then slammed business tycoon Donald Trump as "a bit daft".
He said: "It didn't seem like he knew much [other than capitalism].
"It's not like he's a person who's a super guy or anything. He's just good at hungry hippo, and we live in hungry hippo land."

Jennifer Hudson's wedding "plans" are in place.
The 33-year-old singer has been engaged to wrestler David Otunga for six years and she insists they have no plans to rush tying the knot just to please other people.
She said: "We have plans. I guess it's just not moving fast enough for other folks.
"But we got plans and we're okay with them."
The couple have five-year-old son David Jr. together and Jennifer is in awe of her "amazing" little boy.
She told E! News: "He's so amazing. I really can't describe him.
"He's somebody you have to meet and experience on your own. He's an interesting one."
Meanwhile, the 'Walk it Out' singer would love to mentor Pharrell Williams' team on 'The Voice USA' after having so much fun with him when he produced songs for her new album 'JHUD'.
She said: "Being in the studio with Pharrell felt like a party,. [He] allowed me to do me.
"[Would I help mentor with him on 'The Voice?' I'm so there. I would love to do that. That would be fun."

Lady Gaga claims she had "awful" experiences with men trying to take "advantage of" her sexually when she started her career.
The 28-year-old pop superstar had to fend off the unwanted advances of guys she worked with when she was trying to establish herself in the business and she is speaking out because she wants young singers to know about the darker side of the industry.
In an interview in The Times newspaper, she said: "I've had really awful experiences with men in the studio. Made me very uncomfortable. I didn't feel like I was being cherished for my vocal talents but was seen more as someone to take advantage of."
When asked if their advances were of a sexual nature, she replied: "Yes. And I don't have to elaborate, but when women who are in the business that are young read this article I hope (they realise) that you do not have to put up with that. And I hope to be an inspiration that if you're talented enough, you can work hard and achieve your dreams."
Gaga - who is currently on her 'ArtRave: The Artpop Ball' tour - insists the pop business is full of "sharks" and if you want to make it you have learn to stand up for yourself.
The 'Applause' hitmaker hopes by being a strong feminist she can help other women.
She said: "It's very hard, this business, and there are a lot of sharks. I wish to set a good example. That's why I'm so honest, because I don't want to give this impression that this was handed to me on a silver platter. It was certainly not like that ... I'm certainly a feminist. A feminist to me is somebody that wishes to protect the integrity of women who are ambitious. A feminist in my opinion is somebody that regards that women have strong intelligence and wisdom. That we are just as great as men - and some of us can be even better."

Taylor Swift insists she simply woke up one day and decided she wanted to be single.
The 'We Are Never Ever Getting Back Together' hitmaker's love life - which includes failed relationships with Harry Styles, Jake Gyllenhaal, Joe Jonas and John Mayer - has been well documented, but she is not interested in having a boyfriend because she is happier than ever living the single life.
She told 'Access Hollywood': "People say all the time, 'You need to spend some time to yourself and figure out who you are' and I never really understood it until it happened to me.
"I woke up one day and I just realised I'm in New York because I want to be in New York. I cut my hair short because I wanted to. I made a pop album because I wanted to.
"There was absolutely no one else influencing me and that was something I was very proud of.
"Right now, it's not something that I'm interested in. I'm not going to change that part of my life because my life is working right now and I'm happy.
"I'm happy about simple things. I'm happy about friendships. I'm happy about music more so than I've ever been before, so that's the part of my life I am really dead set on not changing."
Taylor's latest song, 'Out of the Woods' - rumoured to be about her previous three-month romance with Harry, which ended in January 2013 - tells the story of her being involved in a death-defying snowmobile crash with an ex-boyfriend.
And the 24-year-old beauty insists she wanted to write the song - which was released yesterday (14.10.14) and will appear on her fifth studio album '1989', which is out on October 27 - to show people not everything that happens in her life becomes public knowledge.
She added: "Honestly, I think I put that in there because people think they know the exact narrative of the way that my life has gone.
"They think that everybody who reports something is telling the truth. Like, every source is a real friend close to me. When truly, the reason most of the things in the media that are written about me aren't true because none of my real friends would ever talk to the press."

Michael Keaton would reprise his role as Batman if he could work with Tim Burton again.
The 63-year-old actor played The Caped Crusader in 1989 movie 'Batman' and the 1992 sequel 'Batman Returns' and admits he would be prepared to create a new cinematic story if Burton wanted to.
When asked by Entertainment Weekly if he would don the Batsuit again, he replied: "If it was Tim Burton directing? In a heartbeat."
Keaton also praised Burton, 56, for being the first director to create "dark" superhero films, something which directors like Christopher Nolan - who helmed 'The Dark Knight' trilogy with Christian Bale as Batman - have been lauded for.
He added: "Tim, in the movies, really invented the whole dark superhero thing. He started everything, and some of the guys who have done these movies since then don't say that, and they're wrong."
Keaton decided to exit the Batcave after the second film, handing the famous cape over to Val Kilmer for 'Batman Forever', despite being offered $15 million to star in a third film.
Explaining his decision to walk away from the franchise, he said: "It sucked. Yeah, it was just awful."
Despite having played the character, Keaton has never watched Nolan's films properly and has no words of advice for current Batman Ben Affleck, who will make his debut as the DC Comics character in 'Superman v Batman: Dawn of Justice'.
He said: "Chris Nolan is great, but I've never seen any of the Batman movies all the way through. I know they're good. I just have zero interest in those kinds of movies. I mean, people are asking me, 'Is Ben Affleck going to be any good?' And my attitude is, First of all, why would you ask me? Second, he's probably going to be very good, and third, frankly, it's all set up now so that you're weirdly kind of safe."