Fire door detached garage to roofed over passage ?

[fourtytwo]

I have a strange situation where a once detached garage has had the 1.5Metre gap between itself and the 2 story house roofed over (as an extension of the flat garage roof) with access doors to front & rear gardens at both ends making a sealed passage. The original kitchen back door also opens on to this passage together with a side pedestrian garage door. The garage floor is about 500mm below the passage floor.

Does anybody know if the garage door in this situation needs to be fire rated ?

I should mention that if it were the fire would simply burn through the flat roof structure above making it somewhat superfluous IMOP

 

[^woody^]

And you would exit the kitchen door (ie the means of escape route) into a raging fire.

Garage is now attached and adjoins a room, this requires a fire door

 

[fourtytwo]

Ahh put like that I get it
Thank you for the reply.