AAAs & WORLDS TRIALS Complete results Day One report How the AAAs/Trials work

The duo ran side-by-side and Malcolm came off the bend just ahead before Devonish attacked again.

But the Welshman answered on the line, dipping to claim the title in 20.65 seconds with Chris Lambert third.

"I knew he'd be on it and I had to run to the best of my ability," Malcolm told BBC Sport.

Devonish, who was disqualified from the 100m final on Saturday, will now need to achieve the world qualifying mark of 20.59 to be certain of his place in Helsinki.

Tim Benjamin asserted his position as Britain's top 400m runner, defending his AAAs title and qualifying for August's World Championships.

The 23-year-old went stride-for-stride with Malachi Davis but moved clear over the last 40m to win in 45.53 seconds.

It has been a really great weekend. After last year it's smashing to come back and run like this 400m and 200m champion Donna Fraser

Benjamin said: "I've been ill with flu all week and wasn't going to come but I was desperate to book my place for Helsinki."

Donna Fraser was in imperious form in Manchester as she claimed the women's 400m crown in world qualifying time.

The 32-year-old led coming off the final bend and stretched away to win by a clear margin in 51.28 seconds.

Fraser then ran her fourth race of the day to claim the 200m in 23.37. The Londoner is the first woman since 1945 to wrap up the 400 and 200m double.

"It's taken its toll now but I'm really happy," Fraser told BBC Sport.

Nathan Douglas was back on song in the triple jump, landing two personal best jumps in quick succession to defend his title

The 22-year-old opted not to jump again after reaching 17.64m on his second attempt, a mark good enough to reach Helsinki and beat Jonathan Edwards' championship record.

Phillips Idowu never really got going and finished back in third with a best of 16.29m with Steven Shalders second.

Nick McCormick, advised by Brendan Foster, battled to victory in a tense men's 1500m which went right down to the wire.

McCormick delivered a mature performance to win the 1500m

The 23-year-old held off Andy Baddeley and Olympic finalist Michael East - back from injury - and lunged for the line to win in three minutes, 37.05 seconds.

"They are quick finishers and took some beating," McCormick told BBC Sport. "Two years ago I was finished more or less but hopefully I can push on now."

Helen Clitheroe took the women's race by some margin, winning in 4:08.30 - though she is still chasing a world qualifying time.

Tim Bayley was a surprise winner of the men's 800m in Manchester.

The Belgrave Harrier surged down the home straight to win in a personal best time of 1:48.52 - outside the world qualifying mark.

Pre-race favourite James McIlroy could not handle the hot conditions and dropped out at the final bend.

With no Olympic champion Kelly Holmes in the field, Susan Scott took the women's honours in 2:02.98.

Photo Gallery: Day Two at the AAAs

Nicola Sanders beat an intriguing field in the women's 400m hurdles to claim her first AAAs title in 55.61 - just one hundredth of a second outside the world qualifying mark.

Scotland's Lee McConnell, switching from the 400m flat, led the race but was pushed into second by Sanders.

Also making a surprise return to the track in the final was former British number one Tasha Danvers-Smith, who finished sixth just seven months after giving birth to a baby boy.

There was another comeback in the men's race, as Mat Elias took the men's title in 49.68 in just his second race of the season.

In the absence of Jo Pavey, Hayley Yelling took the 5,000m title for the third time in four years.

Yelling ran a tactical race to claim the 5,000m title in Manchester

The 31-year-old tracked Natalie Harvey and with 200m remaining burst clear to win in 15 minutes 45.67 seconds, in sweltering conditions.

Yelling's time is outside the world standard but Pavey has the mark after lowering her personal best to 14:40.71 in Rome on Friday.

Kelly Sotherton tuned up for her heptathlon challenge in Helsinki by claiming the women's long jump title with a fifth-round effort of 6.48m.

She then threw a personal best of 13.86m in the shot put, which was won by Julie Dunkley in a season's best of 16.14m.

Ben Challenger rediscovered some form to notch up his third straight AAAs title in the high jump, clearing 2.27m - just short of the 2.30m required for the Worlds.

In the men's 3,000m steeplechase, Scotland's Andrew Lemoncello claimed the title in 8:33.93 - outside the world standard - but only after leader Stuart Stokes fell after a jump with 250m to go.

The women's event was a closely fought affair between Tina Brown and Jo Ankier.

Brown found an extra gear on the home straight to win in 10:01.58 - good enough to reach the Commonwealth Games.

Goldie Sayers won her third straight javelin title with her second effort of 57.99m. The 22-year-old is still short of the 62m needed for the Worlds.

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In the pole vault, Janine Whitlock did enough to take the title, soaring to 4.20m.

The Manchester athlete was outside the world qualifying mark - where she can compete after serving a drugs ban - but she has already reached it this season.

Manchester's Shirley Webb claimed her first AAAs title in the hammer with a throw of 66.60m.

Philippa Roles took the first title to be decided on the second day of competition in the discus.

The 27-year-old took the AAAs honour for the second straight year with a throw of 57.01m but was well below the required marks for the Worlds and Commonwealths.

Ireland's Colin Griffin won the men's 5k walk in 20 minutes, 44.45 seconds to edge out King twins Dominic and Daniel.