Converting dining room off kitchen into bedroom

[LPW]

Hi all 

What would be the minimum requirement fire safety wise, if you wanted to start using the dining room in a 2 storey house into a bedroom? It’s an old council house (built 1950s), Dining room is off the kitchen and has only the one entrance into it from the kitchen. Back door is adjacent to the dining room entrance and distance is approx 3m, but you need to walk past the cooker to get to it. There is a window, in the dining room but it doesn’t comply to current building regs as it only has a small opening window at the top, so there is no other alternative means of escape. There is also a fuse box and gas meter within the dining room. 
 

it’s been suggested, that a new window is fitted with an opening big enough for escape, new fire door, extra detection and some form of fire resisting cover for the meters/boxes, but was just wondering what would be the minimum legal requirement?

 

Thanks