Just looking for some advice please, I have moisture resistant plasterboard was just going to tank this with everbuild aquaseal. Its a standard ensuite shower over resin tray, but for the cheap cost figured best to put some tanking on, easier than dealing with issues later. Getting porcelain tiles and looking for any recommendations on a good adhesive/cement to fix the tiles on the wall. I would be getting a powder mix your own type but not sure if a specific cement is needed to adhere to the tanked walls?
Slow set flexible as Roger has mentioned. Whatever brand, getting the consistency right will make a big difference to its workability, as will mixing it thoroughly with a mixer rather than by hand.
Look at the Ardex range - choose a flexible and not a rapid set version. They also do white and grey version of most with grey being the cheaper. Then a coloured Ardex grout to finish.