World Championship 400 metre champion Christine Ohuruogu has tweeted her thanks to fans after her photo-finish
Six years after winning her first world crown, the British athlete recovered from a terrible start to surge down the home straight and pip reigning champion Amantle Montsho to the line.
Mo Farah has booked his place in the Men's 5000m final at the IAAF World Championships.
Farah, who became the first British man to win a 10,000m gold medal at a World Championship this weekend, crossed the line today in 13.23.93 and took the fifth qualifying place.
Defending champion Farah will compete in the 5000m final in Moscow on Friday evening.
London's Christine Ohuruogu has won the 400 metre final at the World Athletics Championships in Moscow today.
London athlete Perri Shakes-Drayton has made it into the semi-finals of the 400 metre hurdles at the World Championships in Moscow.
The British number one has the third-fastest in the world so far this year behind favourite Zuzana Hejnova of the Czech Republic and the USA's Kori Carter who is absent from the championships.
London's Christine Ohuruogu has booked her place in the World Athletics Championships 400 metre final in Moscow tomorrow.
A perfectly timed late surge ensured the semi final win. She posted a time of 49.75.
London athlete Christine Ohuruogu will take to the race track in Moscow today in the semi finals of the women's 400m race.
Mo Farah told the BBC "it was great to come here and win the one that was missing,"
Rival distance runner, Ibrahim Jeilan, who beat Farah for the title in the last World Championships in 2011 was hot on his heels throughout the race.
Mo admitted: "I had the experience of a couple of years ago. This time I saw Jeilan coming...I was digging in and digging in, looking across. I knew I had won only when I crossed the line."
It is thought that he will compete again next week to try and regain his 5,000m. If he managed to win it, he would recreate his iconic double gold win at the London Olympics last year.
Mo Farah has once again carried the hopes of the nation over the finish line at the Athletics World Championships in Moscow. He beat rival Ibrahim Jeilan to win in 27 minutes 21.72 seconds.
The Russian President had to walk into Downing Street by the back steps because of a group of Turkish protesters outside the entrance. He seemed to take it in good humour.
The widow of poisoned spy Alexander Litvinenko tonight accused a coroner of abandoning "his search for the truth about Russian state responsibility for her husband's death".
Marina Litvinenko's criticism comes after Sir Robert Owen revealed he cannot hear in public evidence linked to the alleged involvement of the Russian government.
The ruling was published after the coroner accepted an application by the UK Foreign Office to keep certain information under wraps.
A statement from Mrs Litvinenko's solicitors described the decision as "a tragedy for British justice".
It added that it set a "frightening precedent" for all of those trying to "expose the crimes committed by conspiracy of organised criminals that operate from the Kremlin."