BA has 324 arriving flights today, about average for a Thursday. Some will be for T3. The airport has 651 arrivals scheduled in all, which is somewhere between average and busy. Baggage stats are not impressive today, only 61% of BA's bags are being returned within the service level, yesterday it was 84%. I don't do checked bags but if I did I would just leave after 1 hour and get BA to deliver the bags to you in 2 or 3 days.