London Marathon runner Duncan Ayers will be pounding the capital's streets on Sunday to help a charity which has supported his north Norfolk brother, paralysed in a horrific accident 10 years ago.

Duncan, from Sheringham, hopes to raise �2,000 for the Spinal Injuries Association (SIA) which has helped his older brother Simon who lost the use of his legs, aged 31, when a deliveries cage pinned him against a metal window at the town's Budgens store breaking several vertebrae.

'I've learned that a spinal injury can change someone's life and the SIA really do make a difference for people in the UK,' said Duncan, a TV cameraman who has been fitting his training schedule around work and has been seen jogging at the Oxford v Cambridge Boat Race and in Kazakhstan during the Asian winter games.

He last ran the London three days before his 21st birthday, raising over �1,200 for the RNLI. Simon, who had worked at Budgens for 12 years before the accident, was an on-shore crew member with the Sheringham Lifeboat and helped with the town's football team.

'Simon is part of the Sheringham tapestry and the town really rallied behind his recovery,' said Duncan. 'The SIA have helped him immensely and I wanted to do something to raise funds to make it possible for them to continue the great work, so I have dusted off the running shoes and been training for months.'

Sunday's event falls the day before Duncan's 31st birthday and he is hoping his preparation will pay off and that he will be able to beat his 21-year-old self. He has asked for donations instead of birthday presents this year and is looking forward to a birthday beer once the race is over; the first he will have supped since beginning his training.

Anyone who would like to support Duncan can do so online at: www.justgiving.com/BigDunk