99.9% of things in the UK are half-done. If you want a reliable good service, the UK isn't your country. Korea, Hong Kong & Japan are you best place with 100/100mb connection for about $30 and 1/1GB about $120.
They want to put HDTV through the Broadband network soon, aw that will be funny . Costs roughly £21 to send 2hrs of HDTV over the network. So to watch TV I doubt you'll be able to use your connection as well. The exchanges will explode at the capacity they expect it to withold.