And I didn't see the Maastricht Treaty signed until 1 Nov. 1993. Might want to check to see when the current "EU' was formed. UA flew transantlantic prior to Nov 1993, which is the time the Eu was formally established.

Perhaps you are thinking of 1973, when the UK joined the "European Communities"? (note the EC is not the EU. The EU is a parliment that officialy started 1 Nov 93, and was signed previous to that, but not active, in 1992.) http://en.wikipedia.org/wiki/Maastricht_Treaty