There are no specific laws involved here. (The restrictions applying to business premises, relating to the use of CCTV, don't apply to domestic properties).
However, as with any tenanted property (irrespective of whether the landlord is a local authority, housing association or a private landlord) there might be restrictions within the tenancy agreement related to, for example, drilling holes into wall.
So if your council would be happy for your to drill into the wall to put up, say, a bracket for a hanging flower basket, there should be no problem with you drilling into the wall to attach a camera. (i.e. there's no restriction on CCTV cameras, per se, but you might need to check up whether you're allowed to attach them to your walls).
Chris