Sir Mo Farah prepares for London Marathon with Big Half victory

Mo Farah celebrates after winning the Vitality Big Half marathon in London. John Walton/PA Images via Getty Images

Sir Mo Farah's preparations for the London Marathon got a lift as he won the Vitality Big Half on Sunday.

The four-time Olympic champion completed the half-marathon course in the capital in an unofficial time of one hour, one minute and 39 seconds, vindicating his decision to not pull out of the 13.1-mile race despite the bad weather which had affected the country.

Having trained in Ethiopia he won a sprint finish with 2017 London Marathon winner Daniel Wanjiru, of Kenya. Britain's Callum Hawkins was not far behind in third.

Farah, 34, who is getting to grips with his new career on the road, has yet to make a decision over whether he will run the marathon for Team GB at the 2020 Olympics in Japan.

However, Sunday's victory is a fillip for Farah ahead of the London Marathon, which takes place on April 22.

Charlotte Purdue was a comfortable winner of the elite women's race, with Lily Partridge second and Charlotte Archer third.

Farah said afterwards: "I enjoyed it, it was comfortable. Training has been going pretty well and it wasn't too bad at all.

"I thought the conditions would be worse, it was a little bit wet and cold -- compared to 25 degrees in Africa it's a big shock but you just get used to it."

On his prospects for the April 22 race, he added on BBC Radio London: "I'm just going to keep working hard, get ready and not get too excited."