According to this report, 63% of homes had the internet in 2006! However, this report shows that it's about the same today, despite increasing by about a million homes(?) Out of about 27 million British homes, 15 million have access to the internet. If rates of adoption remain the same it will take 12 years for every home to be online (assumptions, assumptions).
This reports that monthly internet transactions topped £4bn.... that's a lot of trust in ecommerce systems!