Jim already the police use predictive software to determine crime spots, in order to optimise limited resources.
The problem the police have at the moment is lack of relational databases, and lack of suitable software to efficiently query and datamine what records they already have. To an extent human rights legislation from the EU rather cramps their style but the events in Northern Ireland during the troubles meant that the army/security forces/police had tags on virtually everyone.
While life is quiet the police have control, any whiff of insurgency and policing devolves to the army with the police as an ancillary force. May be uncomfortable reading for some but you can rest assured it is actively planned for and wargamed. All those emergency planning officers in various uk council offices are not there purely to deal with to deal with weather extremes. Government protects itself, people come a very poor second. There may be a reluctance to mobilise troops but if the situation warrants it, it will happen.

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/644968/UK_National_Risk_Register
https://www.nam.ac.uk/explore/civil-enforcement