Originally Posted by
flarmip
I'd have thought it's also a reasonable use of Avios if you go for the lowest option (typically up to 10% off), as this allows you to discount the booking at a 1p/Avios rate (e.g. 5000 Avios for £50 off).
I do this a lot of the time, especially on short haul HBO fares.
If I can get at least 1p/Avios generally I'll burn some.