thanks all have ordered a new fuel filter and the orange clip. Thanks for the links to the items I need and also the links
the 75 I have is a 53 plate so a later one. I don't think it's an injector issue, it feels as though there's not enough fuel getting to the engine at times. Our TF felt the same when it was in desperate need of a new fuel filter.
It's had fuel system cleaner put through it already anyway, and it's been running on fresh fuel for the last 2 years I've had it and the fuel was very low when i first collected the car so didn't have much old fuel in it at all.
Strangely not getting any relevant fault codes either.