I really hope it's just age. The pump was out of my spares box so was in unknown condition. I did test it but who knows.Wonder what kills these pumps?
There's nothing unusual about Dragon's fuel system - the car started up perfectly last weekend and ran normally, but once the engine stopped, apparently so did the pump, permanently. This time I fitted a brand new battery (Bosch Silver) which was a reasonable 12.5v when I got there. There's a solar charger on it.
Maybe some gunk got past the strainer and caused the impeller to seize? Which is kinda unlikely as the last time I got fuel was in 2019 and UK fuel doesn't noticeably degrade with age.
I can't explain it.