Chris Allison, Metropolitan Police Assistant Commissioner, has warned that last minute events in 2012 to celebrate the Olympics could be "dangerous".
Mr Allison is heading the Met's 2012 security planning and preparations, and told the London Assembly's Health and Public Services Committee last week:
"People have got to understand that 2012 will be a very different year.
This is why it is important for the Greater London Authority to get people to sign up to say they are not going to do something last-minute because that could be dangerous.
They (event organisers) need to see that there will be a challenge for us in 2012 and to self-regulate."
I can't see this working at all.
Olympic Medals won during the Beijing 2008 Olympics