For the walls of the shower area, I planned to use aquaboards then apply tanking (Aquaseal waterproof tanking system) (https://www.bcprofiles.co.uk/aquaseal-wet-room-system-4-5m2-kit/?gclid=EAIaIQobChMI3oHZyumk4AIVy7vtCh0FsgOqEAQYASABEgL0afD_BwE) . The shower tray will be set against the tanked walls using @Nickfromwales special method as on several other posts before tiling the walls.
Do I need special waterproof plasterboard and if so, recommendations please? If not, can I use the cheaper green ones and just tank them well?
thanks.