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Thanks panicbutton, you r right there is no incentive for the industry to sort it - I reckon it's worth something like 20 million (yes!) a year in revenue (fixing, replacing fuel etc).
And thanks walter2004 - I found the device you mention. Problem is the one I bought doesn't work (not sure why, trying to get a replacement or refund). And apparently there are limited supplies (perhaps not being made anymore?)Dunno. And anyway I don't think it will fit inside my fuel cap cavity. Seems a bit extreme to have to sell the car for one with a bigger fuel cap area. That would be an interesting discussion with the dealership salespeople!!
And yes, I'd love to trade my wife in for a new model......perhaps a 21 year old nymphomaniac blonde with no driving license!!!