British Democracy: Banned candidates and censored Party Political Broadcasts?

The British National Party 2014 Election Broadcast by Lib Lab Con. They don't want you to hear what the British National Party really stands for.

https://www.youtube.com/watch?v=am2-fVIkf8I

This is no wonder in a country in which Ed Miliband, Labour Party Leader, wants to ban political candidates from taking part in political debates.