Just looking at some BA flights and it isn't possible to pay in full with points (no availability), but I'm offered the chance to part pay which I've never looked into before.
There's a really odd sliding scale which seems to mean that the more money you take off, it costs you disproportionately more in points. See pic of my desktop calcs where I had to check what it was saying!
So would I be right in thinking that given I can afford the cash price, I might as well pay cash in full and save the points for when I can pay in full for a flight with points?