I flew out and back for the majority of my ships.
The exception being the Dart Container ships that visited Southampton about every 3 weeks.
Even had to join one ship by helicopter off South Africa.
Got caught with 1/2 US gallon of bourbon one time on the Dart ships and whilst customs let me go, they said they'd keep an eye out for me in future. I was dreading the next trip, but when I paid off the company flew me from Rotterdam and I went through Heathrow customs, who were for the most part decent guys. You declared what you had and were unlucky if you were charged. Southampton lot would do you for one cigarette over the 200.
Shame really when I knew a good few customs people when in Southampton college. Any time they had a party, they just clamped down for a week before and voila! stacks of booze for the party.:)