Car failed it's mot with one of the points being a fuel leak between the fuel pump and swirl pot (the barbed fitting in the pic below) I replaced the hose, but the leak remained. I've tried all sorts including no clips, jubilee clips, hose clips, doing them up to varying degrees of tightness, o-rings, even wrapping the pipe in ptfe as a desperate measure, but nothing has worked I'm pretty frustrated as I can't see a reason for it to leak, any suggestions?

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High boost '6 for weekends
406 2.1 Executive for weekdays