The Dream Wall, Graham Dunstan Martin

(From Wikipedia)

The Dream Wall is a novel by Graham Dunstan Martin published in 1987.

The Dream Wall is a novel in which the two main characters dream of their counterparts in a 22nd Century Soviet Britain.

Dave Langford reviewed The Dream Wall for White Dwarf #92, and stated that "This witty nightmare has interesting ideas to offer (including a philosophical assault on doctrinaire materialism): I only wish I hadn't read it during a depressing General Election whose result was all too consistent with Martin's nastier alternative future."