That's the width of the cistern, the (bog standard ho! ho!) pan is a fair bit narrower.
Because Pipe has to fit between bath and wall I have almost exactly 100mm less thickness of tiles.
so
> 25mm for pushfit,
got me worried!
Fortunately any joints will be hidden behind the loo or under the bath, except a strap on joint for a basin waste which will add hardly anything.
I rcekon I can get an extra inch by hacking away at the lathe and plaster though.
> Also worth having a cupboard set flush into the false wall above the basin with mirrored door.
neat idea, although it will be quite shallow.
Neil