these were my initial thoughts.
fuel pump has been replaced in the past six months according to the previous owner. It does have that 'new pump' look, haha.
It does have an inline filter and I'm off to check the filter at the inlet.
I was thinking either filters or float level, feul starvation, because of it's behaviour.
Thanks for your help!
I'll let you know, nothing worse than a thread without an end.