An article on VOX by Guy Michaels and Ferdinand Rauch looks at whether towns in France and Britain are "poorly located." The authors explain that being in the wrong place -- with poor access to world markets and resources, or vulnerability to natural disasters -- has dire economic and social consequences. Examining historical evidence from the Roman Empire and the Middle Ages, they found that towns in France stayed put, while those in Britain moved:
Medieval towns in France were much more likely to be located near Roman towns than their British counterparts (Figure 1). These differences in persistence are still visible today: only three of the 20 largest cities in Britain are located near the site of Roman towns, compared to 16 in France. This finding suggests that the British urban network shifted towards newly advantageous locations, while French towns remained in locations, which may have become obsolete.
They also found coastal access to be important: