Britain's Jimi Manuwa knocks out Corey Anderson in the first round
Brad Pickett suffers defeat to Marlon Vera in his final UFC fight
Gunnar Nelson defeats Alan Jouban by submission, while Arnold Allen beats Makwan Amirkhani
Two fights on the undercard have been cancelled on medical grounds
Live text updates and reaction to tonight's fight card from London
Pickett v Vera - Round 1
Pickett ends the round with a big right hand across the side of Vera's head. It's been back and forward action from both men - Vera's kicking prowess is keeping the Londoner at bay, but when Pickett connects it is with power.
Image source, Getty ImagesPickett v Vera - Round 1
The 24-year-old Vera tries for a jumping knee but gets dropped before scrambling to his feet, Pickett's wrestling skills can't quite take Vera down, as a knee leaves Pickett bleeding from his forehead.
Pickett v Vera - Round 1
Pickett's swinging, looking for the big hand already as Vera tries to keep him at bay with kicks. Pickett gets his man up against the cage wall then scores a huge slam to put the Ecuadorian down and get a top position.
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Jagroop Shinbt
BBC Sport in the O2 Arena
“One Punch” Pickett steps into the octagon for one last time and receives a standing ovation from the crowd inside the arena.
A moment to savour for any fan of British MMA.
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Pickett v Vera
Brad Pickett takes on Marlon Vera for his retirement bout, but the fight will be held at a catchweight of 140lbs, rather than Pickett's natural 135lbs.
Vera took the fight at just a few days notice after Pickett's originally scheduled opponent, Henry Briones, pulled out.
It's been quite the career for Brad 'One Punch' Pickett, since first stepping into the world of MMA in 2004.
With Dan Hardy and Mike Bisping, he was at the forefront of British MMA, paving the way for a whole generation of fighters.
Originally making his name in Cage Rage, he quickly found himself in demand with promotions around the world, before joining WEC ahead of its merger with UFC - where he would land four fight-of-the-night bonuses in his first five bouts, and find a fan in Dana White.
A move to flyweight didn't work out, and with five losses in his last six fights, the 38-year-old announced tonight would be his final appearance before retirement, after a dynamic career that ensured he will be remembered as a fan favourite.
"I do think it’s the right time for me to walk away from the sport," he said this week, external .
BBC Three caught up with him, and a furry friend, ahead of his retirement bout.
British MMA pioneer Brad Pickett ready to bow out at UFC London
The judges score this 30-27, 30-27 and 29-28 for Arnold Allen, who cheekily says afterwards he owes his girlfriend 'a week of loving' after spending so long away training for the fight.
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Jagroop Shinbt
BBC Sport in the O2 Arena
Both fighters share a moment on the ground and collapse into each others arms as the fight comes to a close.
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Allen v Amirkhani - Round 3
Amirkhani gets saved by the hooter as a tremendous technical battle between the two sees Allen getting Mr Finland's back and lock on a choke - but the clock beats what could have been a finishing position from the Brit.
Over to the judges after a remarkable back and forward battle.
Jagroop Shinbt
BBC Sport in the O2 Arena
Both fighters look exhausted just as they did at the end of the second round, whilst the referee demands more action.
Allen v Amirkhani - Round 3
Amirkhani's picking his takedowns better, but Allen's ability to get out of a grounded position, and attempts to score his own submission attempts are balancing out this fight. Amirkhani looks notably more tired as Neil Hall stands the fighters up again.
Image source, Getty ImagesAllen v Amirkhani - Round 3
Allen is notably more energetic, dancing on the balls of his feet before trying a spinning back elbow which just misses.
Amirkhani looks notably more tired, and Allen's picking his punches now.
Allen v Amirkhani - Round 3
Hard to call this so far. Amirkhani's takedowns have been more effective, but Allen's landed more strikes. Allen's reversal of the takedown could have backfired, but Amirkhani looks the more tired coming into the final round.
Allen v Amirkhani - Round 2
Allen lands a couple of strong elbow strikes to Amirkhani, despite the Finnish fighter keeping an underhook in. Amirkhani manages to scramble to his feet, before shooting in for an easily blocked takedown.
Allen looks to go for a choke but Amirkhani reverses position and keeps Allen on the bottom. These two are pretty evenly matched as they come out of the second round.
Image source, Getty ImagesJagroop Shinbt
BBC Sport in the O2 Arena
A small crowd of Finnish fans chant “Makwan, Makwan” for five minutes straight throughout that first round and they don't show any signs of slowing down as the second round begins, and they're still the loudest inside the arena.
Allen v Amirkhani - Round 2
Amirkhani goes straight in with a takedown to start the second round, trying to get a d'arce choke onto Allen, but the Brit manages to roll through to get into a top position and begin landing strikes on Amirkhani.
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Allen v Amirkhani - Round 1
Referee Neil Hall separates the two men after an extended session pinned against the cage. From the reset they begin exchanging rapid-fire blows, with Allen jumping onto a strike from Amirkhani, before responding with a flurry of his own.
A difficult round to score.