I don’t think these have been covered before.
1. UK travellers to the US with a visa no longer have to complete the white I-95 form. Only the customs form is required. This bring things into line with those travelling on ESTA. This was news to passengers and crew alike on yesterday’s Atlanta run on BA.
2. You can’t book an Avis car rental from DCA Washington National airport on the BA web site. If you book IAD Washington Dulles it works fine. Any Avis rental from any Washington metro airport can be returned to any of the other Washington metro airports without fee or penalty.