Get out, stay out, call 999 and don’t attempt to tackle the fire.
If you are unable to escape…
Attempt to dial 999 – give the operator your address and tell them you are trapped.
Put something at the bottom of the door to stop smoke entering your room.
If the room is filling with smoke stay near the floor as that is where the clean air is.
Move to the window and open it and put something out of it to let the fire crew know where you are.