Was on 749 home from Basel tonight and any form of receipt was causing issues. The payment machine wasn't talking to the printer and the backup printer didn't initially work. Only 17 on the flight (15 in ET) so the delay didn't cause any real issues.
Couple of guys opposite managed to amass more than GBP 50 on drinks, hot and cold food. Each to their own. I enjoyed a Hen and some cashews for a modest number of Avios.