It's not just England. Please refer here for a list:
http://en.wikipedia.org/wiki/Docking_%28dog%29
You'll see that most countries we consider in line with our general values have banned it, and I believe it's only a matter of time before it's banned in the US too.
There are a number of excellent reasons why tail docking should be banned, when I've covered in other threads, so I won't repeat myself here. It's not just wild-eyed animal rights proponents who also believe dogs should vote who are against it.