I’m trying to determine why my flat has two doors. The first door from the shared hallway opens into a space approx 1m x 1m then there is another door that goes into the flat. Neither door looks like a fire door they just look like cheap ply doors. Anyone have any ideas about why this arrangement might be in place or recommendations for advice on ensuring the flat is fire safe? Thank you 

Which floor is your flat on and where does your front door lead, to outside or into a corridor then outside?

Thanks for your reply...it is an attic flat and the door opens onto a shared landing at the top of stairs 

If the doors are not fire doors then this arrangement could be a design feature to ensure privacy for people in the bedroom/living room when the front door is being answered. If they are fire doors then it could be double door protection but I do not fully understand why.

Without more information it is not possible to give a definitive answer but the guide for your situation is HOUSING – FIRE SAFETY Guidance on fire safety provisions for certain types of existing housing and check out the example for your premises but it is reasonable certain you will require a FD30s for the front door and a fire alarm for the common areas/each flat. All this should have been taken into account when the Fire Risk Assessment was done.