Wet? Not yet!

Water is not all around me.

I'm assuming this is due to my ignorance of some basic fact or a malfunction rather than a bad set up, but in brief I bought a motorcaravan a month or so ago. On inspection I tested the taps and spurts came out. I was told they didn't let it sit with water in the tank. Seemed fair enough.

Finally filled my tank and now I can't seem to get the tap, shower, or flush to do much, although the flush does give a weak dribble - unsure if it is getting water or if that's a remnant.

Anyone have recommendations for someone I can take it to to have a look around the Oxford / Northampton area? Or potentially Canterbury as I have some business there to occupy me for a few days. I alsl have a question about a switch if unknown provenance which doesn't seem to do anything, so if they do electricals that's dandy to :)

In case anyone has any suggestions about ways I can help myself, the van is a Fiat Ducato 1998 reg, 2500 cc.

There's a PowerManagement System 3.4 fascia on the electrics, by a company called Plug-in Systems. There's a separate switch with a Malaga Water heater, according to the nameplate, which shows a malfunction light after a few seconds.

Superficial information but ... it's a start right? 🤔😅