Domestic CCTV is covered by the following which explains the distinction between cameras that only covers your property and when it captures images of other residents property. The latter falls under the terms of The Data Protection Act 2018 and The General Data Regulation. Note the various conditions and the right of others (including the police) to view any recorded images:
https://ico.org.uk/your-data-matters/domestic-cctv-systems-guidance-for-people-using-cctv/
Cynical head on for hypothetical situation :
So, the door knocks and PC Plod asks if my CCTV covers the street, as a serious offence took place and they would really appreciate any camera footage to help them solve the case. I offer them my CCTV footage, as it does cover the street, and they give me a lecture on breach of GDPR. What a strange world we live in.
the scheme i linked above IS data protection act and legal compliant
I've had the Police round to view my footage a few times (burglary a few doors down and some vandal or attempted break in down the road ) I showed them and gave them the footage ,which probably lead to a suspended sentence, slap on the wrist for someone because the CPS don't want to convict criminals .
I also have given my CCTV footage to the Police, when the house opposite got burgled. My CCTV doesn't cover the whole house opposite but does show their front garden. When I viewed the footage it showed one of two males walk down my drive and try my front door to see if it was double locked. It was, so the second guy walked down my drive and it was him that spotted the camera, so they both walked off to the house opposite. The Police told me that the reason my footage would have been inadmissible in court was because .......... it wasn't date and time stamped.
So folks, if you are unfortunate enough to have something happen at 2am Saturday morning, and you've captured it all, including faces on your CCTV, unless your CCTV says it was 2am Saturday morning it's worth diddly squat. As I said, what a strange world we live in.