Hello - I have a ground floor flat in a victorian terrace which shares a common entrance with the flat above. We are replacing our shared external front door that exits out of the house. Does this external door need to be fire rated? Thank you. 

If it is a fire exit door (i.e. leading directly to fresh air) then typically this would not need to be fire resistant, unless it opens out on to an external escape route or external escape stairway in which case a fire door may be needed to protect occupants using the outside routes?