Ireland's David Campbell beat Laban Rotich in the 1500m

Gillick was disqualified in the 400m as Paul McKee finished fourth in 47.05 while local woman O'Rourke (13.13) could only manage third in the hurdles.

Best Irish performance of the day came from David Campbell who defeated Laban Rotich to win the 1500m in 3:42.20.

North Down's Amy Foster finished seventh in both in the 100m and 200m in windy times of 11.80 and 24.18.

Twice European Indoor Champion Gillick had hoped to build on his recent Irish record run in Switzerland but he jumped the gun at the Mardyke and his head-in-his-hands reaction said it all.

Trinidad's Ato Motibo took victory in 46.44 ahead of the USA's Mitch Potter (46.69) with McKee, still grappling for form, having to be content with fourth and Gordon Kennedy (47.31) taking fifth.

Gillick attempted to rescue something from the day by running the 200m later in the afternoon and his time of 21.12 left him in fifth behind winner Paul Hession (20.43) who edged out Jamaica's Clement Campbell in a photo-finish.

The wind reading of 4.7 metres per second meant that Paul Brizzel's Irish 200m record remained intact.

Derval O'Rourke (13.13) could only finish third in the high hurdles with England's Sarah Claxton taking the victory in 13.04 ahead of Nigeria's Toyin Augustus.

O'Rourke had finished ahead of Claxton at last weekend's European Cup meeting in Finland so Saturday's performance was a disappointment after some recent encouraging runs.

The world indoor champion said after the race that she had not yet got into the set position by the time the gun went off and that she had lost two metres to her opponents as a result.

David Gillick reacts after his disqualification in the 400m

David Campbell's 1500m win was a notable breakthrough with Kenyan Rotich .64secs back in second and Australia's Nick Bromley (3:42.94) third.

James Nolan (3:44.17) was third and Liam Reale (3:44.61) took seventh so Campbell now has genuine claims to being Ireland's top current 1500m runner.

Other Irish winners were Joanne Cuddihy and Mary Cullen.

Cuddihy won the women's 400m in 52.26 and those behind her included Guyana's Aliann Pompey (52.41) and Britain's Donna Fraser (53.51).

Cullen took the 3,000m in 9:12.59 which left her ahead of Britain's Laura Kenney (9:17.36) and another Irish runner Maria McCambridge (9:19.53).

Laverne Jones of the US Virgin Islands claimed her expected 200m win in 22.67 with the wind reading only slightly over the allowable limit.

Other classy performances included Reece Hoffa's shot putt win in 21.47 and Amy Acuff's high jump victory with a world-class leap of 1.92m. Ireland's Deirdre Ryan could only manage a best mark of 1.80m which left her joint-sixth.

Jamaica's James Beckford (8.02m) was over eight metres in the men's long jump although the wind limit was well in excess of two metres per second.

The men's 100m was won by American Da Bryan Blanton in a windy (2.4) 10.14 with England's Mark Findlay (10.24) in second.

Brianna Glenn won the women's short sprint in a windy 11.17 while Russia's Olisia Tyurina won the women's 1500m in 4:25.11 with Ireland's Roisin McGettigan (4:26.12) in third.