My local tile shop pushed the webber spf white up to £19 a bag too recently, when questioned they pointed out that it retails at going on £30 a bag...scandalous.
On a decent size floor that £60- £100 difference could be the difference between winning or loosing a job, even with the extra bodywarmer and t-shirt points still aint worth it...
Tilemaster for me from now on.
Always loved Weber ,but feel (maybe its just me ) it has changed, so have been using Mapei a lot.
I get ultra spf grey for £10 and white for £10.50. Fixed prices for a min 3 years. Great addy for a great price i think.