Question: what is bt tv hd extra?
Answer: ​The new HD channels – which include Discovery Channel, TLC, Animal Planet, British Eurosport and British Eurosport 2 – will be available as part of BT's HD Extra bolt on. At £3 a month, this offers HD versions of most of BT's Entertainment pack channels, plus HD versions of BT Sport 1, BT Sport 2 and ESPN.