ok my problem sorted now. I been sent to p&p autoservices garage in Taunton . They diagnosed dpf problem and sticky egr. Removed dpf filter - fitted emulator and cleaned egr and the car runs fine now. Definitely recommended. Apparently they can sell you an emulator and give you some support with fitting it . But I didnt have friendly mechanic anyway so left complete job for them . If someone would be looking this is website address www.pandpauto.co.uk.