Thanks for that, I also have the LDW & BSW green lights on the dash flashing on and off. Any idea as to why?First choice (and quite common ) is a slipping fan belt.
Second choice is the water pump bearing.
On old engines the cam belt idle pulley bearing can get noisy but that's unlikley to be your problem.
I'd check out the fan belt first, and it's easy to change or tighten up.
There is also the alternator bearing but that's relatively rare to give squeaks.
Thanks for that , I have cleaned the lens and that appears to have done the trick, spookily the squeaking has stopped at the same time.