PAUL IN LONDON: ATTENDED A DISCUSSION ABOUT HIS NEW SONG "HOPE OF THE FUTURE" - MORE PHOTOS

Paul flew into London to attend a private invite only session to discuss his new track Hope For The Future and song-writing.

Paul looked everyone of his 72 years as he joined supermodel Lily Cole at a secret venue to members of her Impossible organisation.

He was joined at the event by 26-year-old international supermodel Lily Cole.

The flame haired beauty chose a casual outfit of a black jumper with the word 'Power' and loose cream trousers.

Say again: Stella McCartney's dad strains to hear what one of the audience members is saying as he addresses questions from the group

The Cambridge art history graduate who has also become a technology entrepreneur - launching a wish-fulfilment website called impossible.com - wore her red hair down in loose waves and went makeup free.

Impossible is an altruism-based social network which invites people to give their services and skills away to help others. 

Macca's new song is for the computer game Destiny and was recorded at Abbey Road studios with a 120-piece orchestra.

Members of the audience were able to ask Stella McCartney's dad about the meaning of the track and how he creates his enigmatic music.

A representative from video game developer Bungie who are are behind the game, explained to Clash Music, why Paul got involved with them: 'He’s in it for the creativity. He got a wonderful opportunity to reach an audience that wouldn’t typically be immersed in Paul McCartney. 

'They might hear the name — of course he’s everywhere, the Queen’s Diamond Jubilee, the Olympics, obviously he’s touring and recording nonstop — but he sees it as a way to reach a new audience that might not otherwise hear his music.'

Last week Sir Paul was in New York with third wife Nancy Shevell to support his designer daughter Stella, who was being honoured at the 2014 Women's Leadership Award gala at Lincoln Center.