Forgot the vacuum cleaner, but took along a pal to help with unscrewing the lock ring that holds the pump in (two hammers opposite sides of the ring 'turrets'). Wouldn't have got it off on my own, I think. Also wouldn't have got the fuel hoses off, cos I hadn't brought my glasses and couldn't see how the latch worked. He did. Anyway, having ordered the business part of the pump from GSF, but not yet collected, we went to the car to eyeball the pump, to see how easy it would be to fit just the above 'fuel pump swirl pot' section as opposed to an entire pump assembly (half the price for just the pump). Just before we left, it occurred to me that another thing to check whilst in there would be the connections to the pump motor itself (not the external 4-way loom connector, but internal spade connections. Pic of similar connections stolen from an ebay ad for an aftermarket pump: One was nice and tight, just a plain male/female 1/4" spade, the other was one of the flag type connectors with a latch so it can't come off. It hadn't come off, but it was as loose as a goose, and there was no sign of the usual 'fresh metal scrape' you get when you disconnect a good one; all dull metal. Squeezed each side of the receptacle with some little pliers, reassembled everything. Fixed. 😁