Create Kitchen/Diner

See attached plan and section. Scope is to remove wall and chimney between the kitchen and the dining room to create Kitchen/Diner (C to D) Also to the arch in the hallway between B and C and to bring the wall at the bottom of the stairs down to approx 1.5m from floor level.
The drawings are rough sketches with approximate dimensions only
Property is in Cheshire, Postcode district CW8 2