Thanks Charlie! I'll get those glow plugs checked ASAP. I like that idea a whole lot more than replacing injector nozzles price-wise. Honestly, I was hoping that it would be that simple, but fearing the worst.

And thanks for the DIY info. You're right, I'm slowly working my way through the car, fixing problems and potential problems as I go. It's just going slowly due to funding, and some of the special tools required for certain jobs are a bit pricey!