Sure someone will confirm but I think it's either this
https://www.replacementkeys.co.uk/bkg-845-key.html
Or this
https://www.replacementkeys.co.uk/kentec-901-key.html?gclid=Cj0KCQiAqY3zBRDQARIsAJeCVxNgArOhxQ-J2_uLUuuP9-ZZN3XR_lSIW07-Xb0jkVkshHo8JbOVo5YaAsSWEALw_wcB
Once you've removed the old one of course
Lol, all he does is ask questions on there, no issue with intruder but asking about fire makes me wonder. Tell him, like most things in Brighton they can be back doored quite easily...
Codes are a complete waste of time nowadays imo unless it's something like cotd.
@PJ your mate was asking about defaulting a hkc on FB, I guessed one of yours?