"If" we leave the customs union.
I would also hate to see the return of the certain type of low level criminals (who seemed to be under the impression that they were some kind of modern day gangsters) that that trade attracted to this town.
Also a possible return of huge queues to get through the docks, is among the media's battle of the scaremongering:
http://www.bbc.co.uk/news/business-39430999
We've been told we can't cherry pick which conveniences to being in Europe we keep, and apparently we're going for a pretty hard brexit.
We certainly live in an interesting area in interesting times.