Any Electric blanket/bedding (Morden SW20)

Hi, my cousin is a lodger and her landlord who lives in the property is refusing to turn the heating on even though the bills are supposed to be include in the rent. The landlord has given permission for her to occasionally use an electric blanket for now. If anyone has an electric blanket they don’t want anymore it would be greatly appreciated. Her bed is a size double but any size would be ok. She is local to Raynes Park/morden area but also travel if not too far. Thanks a lot