Unfortunalty, I didn't have much time to spend on the mini the past year, such a shame. I missed some big charity event which the car was destinated to in the first place.
I managed anyways to rebuild the fuel system a couple of weeks ago, installed a catch tank in the front wing and a proper bosch 044 to feed the oven in my back. I need now a sunny day to take it to the MOT and test drive it. I'm really anxious to see if it made a change, if not after that I'm done.
I replace both looms with new ones (though I feel a bit of a guinea pig on this buy), the rotor, all the sensors, the ECU has been replaced a number of times with new test maps every time (thank you again SO MUCH for all your help) and now the fuel system... Maybe I should try putting om winter tires see if that solves it ;)
I will definitely let you know as soon as I have an update!