Well, would you believe it? (and I'm trying not to swear).
Another pump just stops.
This one lasted under 3 months. :
Working away and the flow stops.
Go back to the van and the pump has stopped.
I check the fuse on the top and it comes out in two pieces.
Not sure whether it broke then or as I was working, but no burnt smell.
I take the top off to get to the bit left inside, and it pulls half the internals with it, including some dangly magnets. (not sure whether they should dangle).
I get home, replace the fuse, and nothing.
It's probably repairable, but I certainly have no idea.
Meanwhile...
Grrrr. Another £80-odd quid.