Mo Farah is preparing to say an "emotional" London Marathon "goodbye" to his home support after confirming his participation in April's race.

The four-time Olympic champion, 39, expects 2023 to be his final year of racing before retirement.

But he is unsure if the marathon will be his last competitive event, saying he will take it "one race at a time".

Commonwealth Games 10,000m champion Eilish McColgan will make her marathon debut in the event on 23 April.

"Without the fans I don't think I would have ever achieved what I have," said Farah.

"It is just nice to say goodbye and I think it will be quite emotional."

Both Farah and McColgan were due to run in 2022 but had to pull out because of fitness problems.

The London Marathon returns to its pre-pandemic spring slot for the first time in three years and will be broadcast live on BBC TV, iPlayer and online.

'I just want to give myself one more shot' - Farah

A hip injury prevented Farah, who turns 40 in March, from taking part in last year's event and this will be his first full marathon since 2019, where he came fifth.

The British marathon record holder is set to contest his fourth London Marathon and has a best finish of third in 2018 - the year he would also go on to claim his only major marathon win in Chicago.

"It has been an amazing career and, for me, to take part in London Marathon is a big deal," said Farah.

"I have always said it would be nice to win it one day, but it takes a lot."

The six-time world track champion, winner of the Big Half in London in September, has raced just seven times since October 2019.

Although he failed to qualify for the Tokyo Olympics - and surprisingly lost out to club runner Ellis Cross at the London 10,000 last May - he admits competing for his country still motivates him.

"I am very proud of what I have achieved and I just want to give myself one more shot and see what I can do. But I have nothing to prove," Farah added.

"I'm not going to go to the Olympics and I think 2023 will probably be my last year.

"At the same time, if it came down to it towards the end of the year and I was picked for the country then I would never turn that down."