Two GAs + one RTO in 30 years:
1985 - RTO at Amman, faulty indicator light on Tristar (RJ)
1987 - GA at CDG, flight in front slow to clear runway (also Tristar - BA)
1994 - GA at GLA, crosswind too strong (BA 767).
Seems like I'm overdue another!
I'm told that if they don't get at least 1 GA every day at LHR, they're not packing them in tight enough (but that may be a slight exaggeration).