Yes, the land is still tilting and the coast retreating in many places but extending outwards in others.

Somehow we tend to think that all contact with the continent must have been by sea across the narrowest gap - the Channel. But, that is one of the most dangerous and treacherous navigation channels in the world. Caesar's fleet was wrecked there and so was William's first attempt. Then we have to consider the Phoenician trade links with Cornwall for tin. Is it likely that they travelled via the channel? Is it not more probable that they sailed up from Gibralter, along Spain, across Biscay to Britanny and then over to Cornwall? Also consider the strong genetic similarities and other evidence linking Spain with Ireland. Great deal of work needs to be done to understand just how and when people moved around the prehistoric world. Fascinating!