Dec '60 I brought my heavily laden 403 back to UK via Lydd courtesy of Silver City, the rest of the family having gone on ahead by train/ferry. No problems at all with Customs. In another later life daily went through crew customs in Queen's building, LHR, to be met by customs officers dressed like naval officers with a portcullis hat badge. Then a few years back drove off the ferry at Dover to be met by a phalanx of dayglo jacketed hatless, what I took to be baggage handlers, only to be shouted at and stopped as I tried to escape. As far as I could tell the only way they could be identified was if they turned their back to you and their job description was written in large letters. How times have changed.