start my largest rewire next monday -5bed over 4 stories 2 things I want to iron out before I start really.... 1) I have quoted for installing LD3 grade D fire in each hall/landing and heat in kitchen- but advised the client this likely may need to be a Grade A system and he needs to seek advise from local BC/fire officer to confirm- and he would need to get a 3rd party contractor to install the Grade A if needed- (basically I wouldn't feel too confident installing it!) which he is happy with- but doesn't seem too fussed with extracting an answer from them- but I am- as I want to know to wire for it or not lol!! -does it need a grade A if its basement,ground,1st and 2nd floor (401 m2-including small garden- not sure m2 of just the house) -also if it is required- are break glasses etc required in a domestic setup or just the smoke/heat head + sounder+panel? 2) The house is a listed Grade 2- again in the quote I added in my terms about this- waving responsibility and it will need making good by builder with chases etc- which he is again happy with- I again told him to confirm any restrictions with his local council- to they reply in his words 'chasing is fine' Am I right in saying grade 2 is only concerned with external of the building- and I should just go easy with the ceiling coving and the (extremely high and thin!!) skirting boards) In terms of cabling for lighting and power- I was just going to wire it in LSF as I can't seem to find a definitive answer on whether PVC T/E is ok or not in listed grade 2- to protect the building from any potential smoke damage.