http://news.bbc.co.uk/sport2/hi/athletics/9397574.stm

Brian Gregan will be in the 400m men's field after producing an encouraging start to the indoor season but the event will be weakened by the absence of Paul Hession who has pulled out because of a back twinge.

Hession was intending to make his 400m debut in Belfast.

http://www.irishtimes.com/newspaper/sport/2011/0215/1224289828924.html

If times from last summer are considered, only seven Irish athletes would achieve the expected A standard for London: Paul Hession (200m), David Gillick (400m), Robert Heffernan (20km/ 50km walk), Colin Griffin (50km walk), Derval O’Rourke (100m hurdles), Fionnuala Britton (3,000m steeplechase) and Olive Loughnane (20km walk).