We fitted the sink (took many swear words) and the tap, we now have running hot and cold water, we fitted a 12v pump and a hot water heater, works like a charm!
We also included 2x 50lt tanks, 1 for fresh water and 1 for grey water with an added tap outside for disposing and a filler cap for the fresh water
I didn't want ceramic tiles due to added weight so I have used sticky back wipe clean tiles and they look and work fab!