A quick measure of the doors, remembering the existing leather sofa came from the previous property and was a bit of a struggle to get in with scuff damage occurring, has resulted in a short list of three. Annoyingly no leather ones anywhere seem suitable, as if verging on being small enough they are all too dark for a north facing lounge. So two polyester covered ones and one a polyester/cotton combi identifed at Ikea packaged small enough to easilly get through a door. Looks like a trip there coming up.