sorry for the delay in responding to your reply.
The first incident on the motorway, the car was pushing water out past the pressure cap.
Since then no but i have not pushed it to do so.
and no i have not checked the actual temp of the engine. mainly because i do not have the equipment.
I resembled the left hand side of the engine this evening and also checked the radiator al seems good. i noticed there is a small electric pump to the right lower side of the radiator which is plumbed into the
cooling system, i presume this activates after the engine is stopped to keep some flow around the block. if this were faulty could it obstruct the flow.