MANCHESTER (REUTERS) - Mo Farah will not race for a third successive 10,000m gold medal in Tokyo this year after he again failed to make the Olympic qualifying time in the British Athletics Championships on Friday (June 25) - his last realistic chance to do so.

Farah, 38, who also won double Olympic gold in the 5,000m, needed to clock 27min 28sec to make himself available for selection, having fallen 22 seconds short of that target in his last outing at the start of June when he was hampered by an ankle injury.

On Friday, he was marginally faster in 27:47.04, but still almost 20 seconds adrift.

Farah, who also has six world titles over 5,000m and 10,000m, moved away from the track to concentrate on the marathon for more than three years but returned for another shot at the Olympics over his favourite distance.

In Friday's race, he was on target pace through halfway but quickly began to run out of partners. By the 6km mark, he was on his own, facing a tough solo time trial to keep his Olympic dream alive.

Despite a noisy crowd willing him on, he began to drop off the pace and after 8,000m, was 10 seconds adrift. He continued to lose time, grimacing as he battled through the last lap, eventually coming up well short.

"Thank you for everyone who's come out," Farah said in a trackside interview. "Oh my goodness. I don't know what to say. You go out there and give it your all.

"I've been lucky enough to have had the long career I've had. I'm very grateful but that's all I had today."

Asked if Friday marked the end of his stellar track career, Farah said: "It's a tough one. If I can't compete with the best, I'm not just going there to finish in a final. Tonight shows it's not good enough."

The British athletics squad for Tokyo will be named on Tuesday but for the first time since 2004, Farah, who also raced at the 2008 Beijing Games, will not be in it.