“We are learning the lessons of the summer riots.”

Outlining plans to extend working hours of courts, she said: “We are really fitting in a whole extra sitting day.”

The plans were drawn up by the CPS, with contributions from police, courts and victim groups. They are believed to apply all areas where Olympic events are taking place, including London and Weymouth and Portland, Dorset, which will host the sailing.

They are understood to target lower level offences such as mugging, pick-pocketing and ticket touting, which may increase as crowds of tourists head to British shores.

Ms Saunders emphasised it was not possible to predict whether overall crime rates would rise or fall during the Games.

However organised crime gangs are already reported to be transporting coach loads of Eastern European migrants, particularly Romanians, to work pre-allocated pitches as pickpockets, beggars or prostitutes.