12 Volt fuel tank sender unit

[Roger]

Before taking bits off and sending them off to specialists hoping they will find problems try Malcom Watts 'Finding fual gauge faults illustrated guide' on the Cornwall A7C web site first.  Easy to follow and you find out which part is at fault yourself. In my case it was a float,  that didn't!. Not a quick job to do but cheeply sorted with the home soldering iron in the warm kitchen, oh bliss.
I agree, a battery isolation switch is a 'must have' item on any Seven.
Peter

Peter 

Where would you suggest is the best location for an isolating switch, inside the car or under the bonnet near the battery? Do you have any suggestions on the type as well.

Roger