The Thames River movement question

[ICTOAN5895]

The time traveler says that the Thames River was still in existance almost 1 million years later and had only moved a few miles from it's former location. How likely is that? I thought a river would move or change much more drastically than that.

[kev67]

I wondered about that. You would have to ask a physical geographer. However, the time traveller did say it was much warmer, global warming I expect. If that was the case then the polar ice caps would have melted and the sea level would be 70 metres higher. Therefore, the Thames would be much wider I expect.