Hi Stevie, but would it not do it all the time if it was one of those you mention? As at the moment, I can't guarantee when it will do it, I drove again today around 20 miles and then later about 20 miles , nothing, didn't miss a beat, that's what makes it so weird, I am running the fuel right down as much as possible, as I am starting to wonder if a bad fill-up a month or so ago could have caused this (I usually top up again when it reaches halfway - so it might not have drained out the system properly yet) even though I did use fuel injector cleaner a couple of weeks back, perhaps need to fill it with some Optimax Diesel when it runs very low, then put some cleaner in it again?