erm I dont think it is that complicated
for a start you are not domestic
you are paying a contract
this ALMOST covers you
https://ico.org.uk/media/action-weve-taken/audits-and-advisory-visits/1560562/outcomes-report-residential-sales-and-lettings.pdf
and you can decide whether you fit or not
however you are a passerby or user and so for example you should be able to demand the CCTV you are on - hence the need for signage. So there isnt a law for signage but you and others should have access to an address to apply for footage
for you - is this legal blah-de-blah or does this sort of thing make sense ?
You can very sensibly ask ( the landlord ) what he is doing with the info, and what his retention policy is.
also the use he is making of it
and why not try - you think he should be registered with the ICO why isnt he?
THEN having thoroughly irritated him, you complain specifically to the ICO using the internet form they have ....
good luck
this is more than a bank holiday suck
GDPR has made the regs bite harder against the CCTV users
it is not really a case of the regs say this - oh oops they say that now - oops nope they say the other....
yeah if you are being recorded I think you have every right to say
what is all this about then?