[Darren] According to the online dictionaries I just consulted, "escalate" is a back-formation from "escalator".

[rab] How many windows do you want replacing? I have a ballpark figure of £5K for my flat, which would be 4 windows replacing, including patio doors. But then I am in the London area.

[Projoy] By that token, anyone outside London should be able to have it done for £1.50, then.

[Raal] Nice to see a new face here. You look a bit like Raak, if I may say so. Anyway, that's interesting because the ones I checked showed the reverse!

[Projoy] We have seven windows in total: three of them quite large (about 2m²), two medium sized (1.25m²) and two wee ones (less than 1m² apiece). We're not in a listed building, or a conservation area, thank goodness, so they can be made out of anything we like, as long as we respect the astragals etc. 5K was the kind of number that was floating around my mind, for some reason, but from what you say it might be a bit more than that.