So I pressed a button I've never pressed before..
And it worked out pretty well!
So just booked a last minute trip to LAS on monday, Y came up as £862 Flight only.
Thought I'd try it with a car, so clicked the Flight + Car option, and to my amazement, the total price for the flights with car, came up as £832 with 100 bonus avios per day.
Worth looking at folks...
Is it usually like this?!