Move a fire door between living room and stairwell

[Viktor]

Good evening,

We are planning to purchase a 3 floor house. As I understand the doors between the stairwell and habitable rooms have to be (FD30) fire doors.
As per the floor plan attached (I hope I was able to attach) on the 1st floow there are 2 fire doors, one between the kitchen and stairwell and another one between the living room and stairwell. We would like to move the door 2 to be door 3 (i.e. we will terminate door 2, to wall in and make a new door), and the door 3 will be a double fire door. This way there will be still firedoor between the stairwell and living room but on a different place.

My question is if it can be done please? Obviosuly we have to call a structural engineer too to make some calculation but from building control perspective is it possible please?

I've exchanged some email with the local building control expert but he hasn't replied yet what I have to do to get an official confirmation.
Could anybody please help me?

Thanks a lot!

*** update ***
Apologies, for some reason I can't upload image.
However hopefully the floor plan can be viewed on https://drive.google.com/file/d/1E981QWdgOn_PY3Bu3oey2ieaWBQIexPZ/view?usp=sharing