Almost 30 years to the day since "Making Your Mind Up" reached the top of the UK charts, Bucks Fizz duo Cheryl Baker and Jay Aston will embark on a 26.2 mile tour of the capital - on foot rather than stage - to complete the Virgin London Marathon.

Baker, who has run the Great North Run twice, will make her marathon debut this weekend and is more than willing to enjoy a sing-a-long along the way.

"If folk ask me to sing along the course I'll sing. I want people to shout out my name. I don't care about the time, it'll mean the world to me just to finish," she said.

It's certainly a healthy shift in attitude since her first outing over the half marathon in the north east. "The first time I ran it nearly killed me," she joked. "But the second one I could have carried on and on. When I finished I thought, ‘I like this, I could do it again - I want to do London.'"

Baker is running for a charity close to her heart, Headfirst, which supports research into head injuries, strokes and associated brain damage.

"Buck Fizz had a coach crash in 1984 and Mike Nolan went through the windscreen and was in a coma," she explained. "There are so many ways head injuries can affect you and that's how we got started on this."

Her band mate Jay Aston is running for an Alzheimer's charity in memory of her dad. "My parents lived down a remote country lane and the carers wouldn't visit him, but when I called them I realised they were very underfunded," she said.

While the girls have very much made their minds up about Sunday, comedian Joe Pasquale joked that he's still not quite sure.

"Well I'm doing it because I have a list of things to do before I kick the bucket and this was top of the list," he laughed. "My daughter is diabetic and she said that if I was doing something for charity I should do something for Diabetes UK. It seemed like a great idea a year ago but now, two days out, I'm thinking I better stop eating kebabs."

He could be doing himself an injustice, however, because he appears to have trained well for the race, and with a best distance of 19 miles under his belt should be well placed to duck inside his five hours 30 target time.

Model celebrities Agyness Deyn and David Gandy are both running for Oxfam, the official charity of the 2011 Virgin London Marathon and the first international development agency to be given that honour.

"When we visited Africa it really affected me and made the issues even more real," said Deyn. "I've discovered that you can really succeed if you put your mind to it, and I hope I can take that in to other areas of my life."

Together with Elen Rivas, who will run for Wellbeing of Women, Deyn can rest assured that she's good looking to fall foul of Pasquale's life mantra: "If you look like your passport photo you're too ill to travel."

Speak for yourself, Joe, but we'll make sure you're on the start line this Sunday.