Hi Dave
Thank you for your reply. The weird thing is that the car is running fine and starts as normal. Having said that i would think as soon as it gets colder again the issue will start.
So, too answer your question. The battery is new about 6 months old. The charging system works fine as i have checked.
Now, as the car has done around 175k i think i may need to change the glow plugs? and at the same time i will check the wiring and also the glow plug controller too.
The fuel filter was changed about 2 months ago.
Thanks Dave