doh...yes confused with metacaulk which is pink....!!!
fire hoods are a reg (IEE wireing regulations 527-02-01)unfortunately but very easy to overcome....
the reg actually states:
Regulation 527-02-01 requires that where a wiring system passes through elements of building construction such as floors, walls, roofs, ceilings, partitions or cavity barriers, the openings remaining after passage of the wiring system shall be sealed according to the degree of fire resistance required of the element concerned...............
"These results were, perhaps, surprising in that they
confirmed that downlighters, even without being
boxed in and with no fire hoods, in plasterboard
ceilings have little significant effect on fire resistance
ratings up to 30 minutes"
It's this '30 minutes' that is critical part of discussion about fire hoods or not. As long as you have the 30 minutes resilience then you don't need hoods and as the evidence above states, between habitable rooms you don't need them.