Thanks for the input guys. It is double plasterboard fixed to a metal frame (no grid tiles) which I'm aware is usually done to offer fire protection hence mentioning it. There is about a 400mm void to above but don't know what was above it. The lights were previously installed but a couple were moved so new holes cut in the ceiling.
In theory it could be concrete above so that would be ok I guess, but I can get the builder to clarify.
In theory it could be concrete above so that would be ok I guess, but I can get the builder to clarify.