The deadline for making applications for Olympics tickets is 11.59pm on 26 April 2011!
You can apply here.
Update Apr 25th:
To quote from the Guardian :
Olympic bosses are expecting a last-minute surge for London 2012 tickets ahead of the Tuesday midnight deadline for applications, though organisers have confirmed that this is not the last chance for members of the public to buy tickets.
Officials said they were “hugely encouraged” by ticket sales, which have surged ahead of the deadline, with Easter Sunday evening the busiest period so far.
But there have been complaints that the rigid ticketing policy will leave many fans disappointed and thousands of seats empty.
“Tickets will be made available again,” said a spokesman for the London Olympic Games Organising Committee (Logoc). “But the best opportunity to get one is now, and we’d really encourage anyone who wants one to try now.”