
What variations in price!!!!
What is a 100 quid to a big posh hotel like that?

?? Come on guys! £65 max

Put it like this!
Trad window cleaner would have to hire a cherry picker or something like that to do that job! I haven't a clue how much they are to hire but I could imagine it would cost in the region of £80-£120 a day to hire one.
That job in a cherry picker I would guess would take 3 hours? Think of the maneuvering time and cleaning time!
Trad guy might want £30 per hour for his labour?
So that = £120 (max?) for picker, £90 for labour, Fuel costs, equipment wear and tear say £10max (inc fuel)
So that's £220!
Wfp = little hassle on that job. 2-3 hours max.
If you put a price in for £150 it is still a good earner and cheaper for the hotel.
Just my opinion.