16-year-old Sycerika McMahon from Belfast bids to earn her ticket to the London Olympics when she competes in the 100 metres Breastroke at the Carlton National Swimming Championships at the National Aquatic Centre in Dublin this evening.

McMahon, the double European junior champion, is the fastest qualifier from this mornings heats into tonight’s semi finals

She will be attempting to go under 1.08.49 seconds to beat the Olympic A standard for London and it will be interesting to see if McMahon attempts to beat the time tonight or wait until tomorrow's final.

Her best time stands at 1.09.24 which is the Irish junior record set in February last year and Emma Robinson's long standing Irish senior record is 1.09.15 set back in 2004.

The Belfast teenager is also through to the semi-finals of the Women's 50m butterfly which also take place this evening at the NAC.

Grainne and Barry Murphy have already qualified for London and having won the 200 Freestyle final last night, Grainne is now off to London to compete in four events, the 200 and 400 individual Medley plus the 400 and 800 freestyle at the British Olympic trials.