Seems to be an increasingly common problem these days. This is fuel hose bought less than a year ago from a major national motor parts factor, and has been on the car for less than six months. It's meant to be suitable for unleaded and be ethanol tolerant... blatantly isn't though is it!
This is far from the first time I've had this happen lately. As such I'm done messing around. All fuel lines are going to be replaced with A1 Marine grade (ISO7840) to hopefully put an end to these shenanigans.
Please keep an eye on this sort of thing - *especially* with the 40 year rolling MOT exemption now in place...
