Is it just a fuse or WHAT??????

Right- on to the water tank now!! Its still leaking from somewhere. I filled the water tank and had a good look around. It seems as though its coming under the floor and draining out, near the sliding door. Also out of the pipe where you drain out for winter. The caps tight, it seems to be coming out higher up, if that makes sense? So I am coming to the conclusion that either a: the plastic water tank is split somewhere low down (although I took the plate off in the little cupboard undid the big lid and stuck my hand in. Coudn't feel 'owt. or b: if the outlet pipe is down there, then maybe thats split or half off/loose. Anyhow looks like I need to strip some of the inside out to get to the tank... Does anyone know what I need to pull out? looks like; the r&r bed? the galley floor cover? and somehow the side of the water tank cupboard? Hope I don't need to strip the whole kitchen out 

Any ideas guys??

Cheers,