Can a fire door with a hole be repaired?

Small ones, yes. A few screw holes, an old lock hole or a spyhole can be plugged with hardwood, glued and cut flush.

Filler is not a repair. It crumbles in the heat.

A cat flap, a big letterbox cut-out or a door that has had panels or mouldings cut in is a different problem. That can void the rating, and a new certified door is usually the honest answer.

Send a photo of both sides of the door and the edge, and we will tell you which you have.