Olympic organisers say they're redistributing tickets to ensure venues get filled up - after public outrage over the weekend.

3 thousand accredited passes were returned for today - and all were then put back on sale last night - with others given to teachers, children and members of the armed forces.

However, not all will be filled as certain areas have to be left aside for officials.

Prime Minister David Cameron's been asked about the issue ahead of the daily Olympic security meeting in Whitehall: