Thanks!
I really thought this could be it so I have just tested this. Engine had cooled off for an hour or so. It started ok and I drove untill this problem started again (again after about 10 minutes). Took of the hose from the fuel pressure regulator but it was dry.. Also disconnected the hose from the inlet side and there is also no sign of fuel.

Disconnected the plug from injector number 3 and started the car. It runs on 3 cylinders not too bad at idle. As soon as I reconnect the plug for number 3 it stalls. When I then try to start the engine you can hear its overfuelling. Disconnect number 3 then start the engine it runs on 3 cylinders at idle.

Last year untill its wintersleep it didnt had a problem at all. Just now that I restarted it it has occured.

Hope someone else has got some good idea for this.