Quick access hatches at critical points for fire extinguishers in a fire/rescue. Special construction engine bays are often hard to access from a fire/rescue standpoint. I think this was a recent update to our rulebook.
Haddie's fire was an example of that where the fire/rescue had problems getting at the under-bonnet fire because it was one piece and low.
Thanks Chris, that makes sense. If I can ever afford the J/BFS I have planned I'll make sure it includes such enhancements. I'll also need to clear out the shed again!