Broadly speaking the US policy of always preparing for the possible lost-comm scenario is completely ignored in Europe. I have often filed a flight plan and then been re-routed so far away from it that it would be foolish to try to pick it back up again in the event of lost comm. In addition, you should not expect ATC to read you a new clearance after they have tactically vectored you around half of Europe. It's not even worth asking - in reply to the call "What should we expect after PAM?", I have had the answer "You should expect further routing from the next sector"!
