Radio presenter Tim MacWilliam will fight through injury and illness as he joins thousands of others on the same wavelength to run through London this weekend.

Radio presenter Tim MacWilliam will fight through injury and illness as he joins thousands of others on the same wavelength to run the London Marathon this weekend.

Despite suffering a string of injuries and being told by doctors last week that he has asthma, the 52-year-old from Wymondham is still gearing up for his first marathon, although he admits the news dampens his hopes of finishing in just over four hours.

'I almost pulled out a few times, but then people stared donating to the charity and I realised I had to do it,' he said. 'I should be fine, but I might have to walk some of it. I'm disappointed I'm not going to be able to run to my full potential, but the main thing is just to finish.'

For Mr MacWilliam, who works at Norwich's Future Radio, the gruelling 26-mile stretch has been a pipe dream for 25 years.

He said: 'I can remember watching the first marathon in 1989 on TV and I thought I must do that next year. Years went by but, finally, next year has come,' he said.

Now the dad of two will run for Micro and Anophthalmic Children's Society, a charity which supports families of children who are born without eyes or with serious deformities.

The Wymondham Athletics Club member, who has already secured over £300 in pledges, described picking up his number this week as a 'bit of a Christmas Day feeling'.

'It's really exciting, although I'm a little bit apprehensive as my health has changed. You look forward to it for so long and then it is finally here,' he added.

He said that thinking of wife Katherine cheering from the side and daughters Natalie and Victoria supporting him from home will spur him on to cross the finish line.

To sponsor Mr MacWilliam visit http://uk.virginmoneygiving.com/TimMacWilliam