"called up" was the wrong phrase - "requested to help" was what I meant
But yes, you are correct. I do not believe there will be enough
It seems to me that the use of the AA in traditional police roles in the last couple of weeks is indicative of this. It releases the police to duties at the various Olympic arenas and training locations dotted around the country (don't forget that many national teams are preparing at a number of Universities dotted around the country and they all need security