All London needs is for some psycho terrorist group to begin a killing spree. The trains and buses stop at the drop of a leaf. This kind of attack would cripple the City and effect millions. It is brave to dramatise such a scary event, maybe even a touch irresponsible, it is only a matter of time before the events in this film become a reality. Just wait for the breaking news headline 'Gunman on rampage in City' and remember you saw it first in 'Day of the Sirens'. VG