Originally Posted by 
Phideaux
				
			 
			Without detracting from other practical advice given by earlier commentators
I've had intermittent trouble starting my diesel TD4 Freelander 2
"To make it worse"
Run the engine for a short time only during a winter period - such as, had to move it and park it again, twice.
When running perfectly, one presses the start button, and there's a pause while the glow plugs warm up, then the engine ticks over.  If it's a bad morning (we had -4C last night) then it will turn over endlessly and blow white diesel vapour until it starts on the third try or so.  Not good.
Or:
Turn the ignition on and leave it - put something in the boot or do your hair or something that takes maybe a minute - then(!) press start - and chances are, it will start as per normal.  
The extra time just gives the glow plugs a bit more time to warm up the combustion chamber as well as an ignition point.
Works for me and my much loved FL2!