"Why should British firms have free passage over foreign countries - it has just removed itself from the only reason it has been able to.
"during which time things will be put in place to the mutual satisfaction of all parties."
Who says and why should countries assist a competitor?"

BECAUSE THEY SELL MORE TO US THAN WE SELL TO THEM.

If they do as you suggest they primarily harm themselves and I do not know if you have checked up lately but the Eurozone is not in all that great a shape. Put up trade tariffs and they cut both ways. How does the bulk of Irish exports get to Europe? What percentage of Irish EU trade is with the UK?