It is accepted that doors to toilets need not have any fire resistance when located within protected zones. However in the UK and in Scotland we generally find that WC's are in most cases

accompanied by baths and shower facilities sharing the same space or room.

Would it be reasonable to upgrade a door to a bathroom to achieve FD30S standard where it contained a bath with electric shower over and separate WC and wash hand basin?

The bathroom opens onto a common corridor serving three sleeping bedrooms in an HMO.

Ceiling mounted hard wired detection is located in the circulation area outside the bathroom door.

See your first submission. 

Edited October 14, 20196 yr by Tom Sutton