It's impossible to do anything but drive in the US. I used to regularly drive between Knoxville and Nashville. That’s 180 miles or about the equivalent of going from Canterbury to Bristol but I’m only half way across the state. There are only about 6-8 towns in between and lots of places on the road where you might see one house but can’t get to it.
 

There has been no commuter rail service between Knoxville and Nashville since the 70s. Canterbury to Bristol has 33 trains daily. At a cost of 70 pounds this is the equivalent of 105 dollars US. With gas at $2.49/gal I can drive this for $16.76
 

There are only two busses daily to Nashville and the price is $37.  I would be nuts to try public transportation. They don’t even build sidewalks in new neighborhoods anymore.