"Stop and search" has fallen by 75%, so that police clearly aren't using their existing powers. However, they also have what you might call emergency powers, which they can enforce for 48 hours -
Section 60 of the Criminal Justice and Public Order Act 1994 allows a police officer to stop and search a person without suspicion. Section 60 stops and searches can take place in an area which has been authorised by a senior police officer on the basis of their reasonable belief that violence has or is about to occur, and where it is expedient to prevent it or search people for a weapon if one