I noticed a puddle under my CU engined Holdsworth last week when running it up on the drive. Stink of petrol gave a clue to its source! Just been checking it over and found the fuel hose after the electric pump to be hard and badly split. I'd replaced all the pipes around five years ago with what I understood to be good E10 resistant fuel hose.
It has DIN 73379 2A written on it, but no R number. DIN 73379 2A should be E10 resistant, but I thought hoses usually also had something like R6 too?

Is this what happens when you shop by price alone?