The exit ramp from a new fire escape door to be installed at our church needs to be parallel to the wall and there is limited width available so that the 'landing' and the ramp does not impede side passageway.  Door opening would be 1050mm so double doors probably required.  Presumably the ramp must also be at least 1050mm wide and that is not a problem, but can the door opening onto the ramp side be opened 180 degrees and held there, so that the 'landing' outside the door doesn't have to extend much more than 1050 mm?  I'd be grateful for any advice, please.

As this is a Building Regulations alteration your designer should submit this proposal to the Building Control Officer or Approved Inspector to approve. As the door isn't protecting an adjacent external escape it doesn't have to shut, so in theory could be latched open.