In article ,
Mogga writes:

We asked in B&Q for it and they don't even sell their own. Someone
else was there looking for it too. They recommended emulsion
We went to focus and they don't stock it either. They recommended PVA.

You might find it in a specialist decorators supplier.
However, most decorators use cheap brilliant white
emulsion, thinned (or don't bother preparing the
plaster at all, and don't care that the paint will
flake off in a few years).

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]