An ex-paratrooper says he is confident he can beat a world record at Sunday’s London Marathon – by running with a 40lb (18kg) pack in 3 hours 20 minutes.

Mike Ellicock was blown up on a special forces operation to save UK hostages in Sierra Leone, only surviving because he was wearing body armour.

The 37-year-old, from Lewes, East Sussex, has so far raised over £20,000 for the Parachute Regiment Charity.

He will be carrying a weight equivalent to a para’s equipment in a rucksack.