Bathroom Condensation hell!

Valli

OP warm wet air hitting cold walls will cause condensation on the walls.
You're never going to stop that but you can

open a window
install an extractor
open OTHER windows in the flat thus ensuring air blowing through
get a shower sqeegee (mine was 99p from Tesc0) and wipe the walls down afterwards

rather than retile you could try wall cladding which may be 'warmer' and thus less prone to condensation.

Run the shower for the minimum possible time prior to getting in but a warm shower WILL cause a lot of vapour

If dampness is an issue you could run a dehumidifier. The previous owners of my house apparently had massive condensation problems and ran one; this was picked up by the surveyor. I don't but then I open windows, routinely, as I like fresh air. I also don't drape wet washing all over my radiators.

RichNotts

I have mould growing in a bathroom which has suffered form a huge amoutn of condensation. I am having extrator etc etc filled. A plastere has quoted to skim the ceiling - will this just cover the mould or could it be a good solution? I'll paint with anti-mould paint afterwards.