I got out of my Sky contract by reminding them that when I offered to join they assured me that I would not notice any change in speed from being with O2.. Like you my speed at best was about 4 megs instead of the 7/8 megs I was getting with O2 and they agreed that as they couldn't supply what was promised they let me out of my contract and I still had Sky HD+ for the rest of the contract at no cost..... Result !

Your case was detrimental to you so normal get-out clause applies.

In reply to a post by FraserSoft:

Like you my speed at best was about 4 megs instead of the 7/8 megs I was getting with O2

I bet DLM failed to start up which left your line on the default 4 Mbps. It does happen because it's unusual for the speed with Sky to be so far off from what you used to get. Usually it's no more than 1 or 2 Mbps lower.