A 19-year-old man said he hoped his achievement of completing seven marathons in seven days would inspire other young people to take up running.

Billy Nunn, from South Benfleet in Essex, completed his challenge at Brighton Marathon on Sunday after clocking up more than 250km (155 miles) in the previous six days on routes around Southend-on-Sea.

He took up running four years ago after a youth worker suggested it might help him release stress, and has been raising money for charity UK Youth with his challenge.