Civil liberties and privacy campaigners say that more than £3.9 million has been spent by public bodies across the country in the last two years on paying private investigators for surveillance work - including snooping on their own staff.
The Big Brother Watch study found 27 local councils nationally had employed private firms to undertake surveillance - ten of which are in London.
Hammersmith & Fulham
Kensington & Chelsea
More top news
A 73-year-old great grandmother shot in her home has been speaking to ITV News London about the incident.
A woman who radically overhauled her diet to cure a rare disorder she suffers from has become the fastest selling food author ever.
Singer, guitarist and pianist Joan Armatrading will be in London next month for the climax of her final world tour.