First of all, are any of these codes to do with the alternator??

And second, how easy are the glow plugs to change??

Could somebody elaborate on all this for me atall?

Just found out a new alternator is around the £100 quid mark so really not keen on changing it if it doesnt need replacing

These could be historic faults, so clear them, go for a run & then check again...sometimes, glow-plugs come up in low-temperatures or if not allowed to heat-up for long periods.

Faults 4 & 5 are alternator-related...but maybe caused by a battery on the way out or the fairly common alternator signal-wire failure. Again, clear & re-check to see if they come back?

All the codes were cleared both when i had the work done on my car (about 2 months ago) and also the other day when we reset them

I had a reallly loud squeak so whipped the belt off and noise went

Taken off the alternator now as i believe it needs replacing

Try changing the alternator pulley. common fault

thats what i was thinking pal, but then knowing my luck the actuall alternator would then go a week later lol