I'm a bit of a novice at tiling, so here goes with a couple of
questions :-} (the tiles are large "bumpy" whites, so the first
question might be moot anyway, as i'm sure they hide a multitude of
sins !)

I've patched up some holes in the walls - the biggest being about 8"
diameter from a Ventaxia fan (the walls are plastered, not
plasterboard by the way) but they're probably not what you'd class as
perfectly flat :-} - I know you can get away with a bit of uneven-
ness, but how much is too much ?

Would a splash of PVA over any fresh plaster be good enough to tile
onto ?

Since it might be a few months (hopefully worst case scenario) before
the bathroom gets replaced, what's the score about tiling onto
emulsion (just to brighten it up in the meantime) - ok, or leave as-is
(bare plaster) ?

Ta :-}