Weir, from Wallington in south-west London, has had a special relationship with the London wheelchair race for many years.
He made his debut in the mini-marathon as an eight-year-old and, after finishing fourth in his first appearance in the main race in 2000, won it two years later, becoming the first athlete to win both the junior and senior events.
Further victories followed in 2006, 2007 and 2008 before last year’s sprint win over veteran Heinz Frei on The Mall saw him return to the winners’ rostrum.
A win at the Lisbon Half Marathon last month in a new world record time means the 32-year-old is in good form in what could be the biggest year of his life.
“Training-wise, I’ve had the best winter I’ve had for a long time,” he said.
“I’ve been in the gym since September trying to ensure my shoulder is in good shape and I’ve had no injuries so it has been a good strength and conditioning winter.
“The London Marathon is up there with all of my achievements because it was the first ever race I did as a young lad and then it was the first big race I won, so it has a special place in my heart.
“It’s my home race and I love it. It’s part of my plans at the start of every year. It’s been part of my life for 22 years or so.”
