Problem solved- new tank, pump, pipes & locking filler cap! Very expensive mistake
Thanks again for replies.
Anyone want to buy a Bongo?

For all those that asked I have found out that it's probably a 'Clumber' side conversion carried out by Outback Autos in Norfolk. The tank is adjacent to the fuel tank. It has a filler cap that looks like a fuel filler cap, hence the error.

Thank you for all your replies especially the last one. Still not sure how to get the diesel out to start with, guess it will have to be syphoned.

I have a side conversion. Does anyone know whether the fresh water tank has a drain plug/outlet. Someone has inadvertently filled the tank with diesel and I need to drain it out! And flush it of course. Any other suggestions as to how this can be done inexpensively will be much appreciated.

Has anyone bought rear wheel arches from Barnsley Auto Panels Ltd and if so did they fit ok? They advertise on e-bay at a price much lower than any others I've seen and I am concerned that they could cost more to modify to fit.

Thanks again Bob and others. I have fixed the central locking, there was a broken wire, and I have fixed the tailgate so it can at least be opened with the internal handle. For some reason that I cannot fathom it still will not unlock with the key externally. There must be a disconnected link somewh...

Thanks for your replies. There is no problem with the keys or the lock as they have worked previously. If I cannot fix it myself I'll look at the "fury" preferred garage list.

Thank you Bob. We were "just living with it" as far as the central locking goes but do need to sort the lock out. I'll try removing the panel as suggested. Hopefully it will be easy to do.

The central locking on my Bongo has stopped working and now the lock on the tailgate has also stopped working with the key. Can anyone recommend a good garage in the Chesterfield area that could fix this for me?