Another datapoint: Domestic LHR-EDI-LHR with car, rtn flight taken 26/02, double points posted 20/03. I was beginning to think about chasing it up, but I see now that quite a few forumites have recently received late-Feb double points.
Anyway, clears up my angst that the slightly poorly worded "multiple journerys from the UK" clause might scupper me, so to [MENTION=719975]TabTraveller[/MENTION] many thanks you were quite right.
Only 80 points but they all count. Well actually in this case they don't as they are pre-April, but hey...