There were hundreds of mines in Derbyshire, Nottinghamshire, Leicestershire and South and southern West Yorkshire, mostly gone now. Mining also happened in Kent, and still occurs in Devon and Cornwall, but for other commodities though.
Let's not forget the once huge coalfields in Durham, Northumberland and Fife. The last mines to close in these regions were the coastal pits taking coal from under the North Sea. There are still substantial reserves under the North Sea, but the further you step out, the more expensive it gets. Along with safety considerations (you are getting further away from an escape point) and geological difficulties it eventually became uneconomic to continue, but the coal is still there.
As for re-opening, not with current technology, the mines flood once you turn the pumps off, trying to pump out the coastal mines would be very difficult and expensive. You can't only pump out the seam you want to work either, as the weight of water in abandoned seams above can be too dangerous to allow work to continue.
Some of the underground railway systems in these mines were immense, and in many cases it wasn't deemed financially viable to return the infrastructure and machinery to surface. The whole lot was left underground, locos and all.