I realise that this is one of those "how long is a piece of string" questions, but a relative has asked me, and I've really no idea...
The job is:
Remove existing bath and dispose of. Tile spaces behind bath to match (more or less) existing walls (top of bath to ceiling is dead standard 6"x6" plain ceramic tiling). Cover as much of floor beneath bath as is necessary (rest of bathroom is vinyl on concrete floor). Route existing hot (from combi) and cold (from mains) feeds to new shower control - pipes can be on surface of wall. Fit shower unit - preferable larger (longer?) than the normal 30" square (or whatever they are) self-contained modules.
I'd be grateful for any and all thoughts, however approximate.
Incidentally (and since this is a DIY group) I feel confident that I could do all of this myself, but the professional quote is what I was asked about.