We are still paying too much for our broadband according to uSwitch.com, even though prices are lower than ever.

It found that the price we pay is 36 percent lower than four year ago, even though speeds have increased. In 2004 the average price for a 512Kbps connection was £27 per month, not an (up to) 8Mbps line costs on average only £17 per month.
The company say that even so nearly 5 million households are paying over £20 per month, now while they point out that this is effectively 'wasting' £162m a year, there is more to deciding on an ISP than just the price. This is why many of the satisfaction survey on ISPs usually see the lower priced providers come a lot lower than the average.