Dont buy cheap glow plugs

You'll omly start looking for faults that dont exist. Pay the money and get some decent ones. I just picked up a set good quality plugs for £16.50. I got them from Motorworld. If anyone wants me to get them a set I will stick em up on E-blag at an agreed time with a buy it now.

I got a set of "WELLMAN" HEATER GLOW PLUGS (set of 6) for £30, like the man says don't get rubbish ones, for a few good reasons

You may get problems with them after a very short time
They will snap off when you try and take them out (especially the first nut)
They wont last long (if your lucky a year, two at most)
They will soon deteriorate, and start to soot up and be less efficient

If good quality plugs are £16.50 a set, then how much is a cheap set?

mine should have been 9.99 each.