I'm new to the forum, so be gentle with me

I have a Ford Focus 1.8 TDCI Duratorque and I have had starting issues with, let me explain;
When ever we have had a cold spell the car would start and run for 10-15 seconds then cut out, after trying to start for 1-2 mins it would start and run without any issues.

Forward onto the next cold spell and we would have the same issue again. I have checked the DTC (Diagnostic Trouble Code) which has logged no faults! I have replaced the cam position sensor which is a know fault on these diesels as well.

I have noticed that there is a ticking/whining noise coming the engine bay even when the engine has not started but the ignition has been switched on and it stops 10+ seconds after the ignition has been switched off or when I remove the connector plug from it. The part where the noise is coming from is in the picture added below behind the oil filler cap.