Internet Usage Statistics

The UK has become the first major economy where advertisers spend more on internet advertising than on television advertising, with a record £1.75bn online spend in the first six months of the year.
The Guardian

Kelkoo, the online shopping comparison website recently did an online survey in the UK and found that 78% of those polled stated that they would be buying the greater part of their Christmas gifts online.
Kelkoo

Sixty four per cent of all adults who use the Internet have purchased goods or services over the Internet in 2009. Of these, 83 per cent (26 million) had purchased within the last three months.
Office for National Statistics

In 2005 the value of sales over the Internet was £103 billion. This accounted for 34 per cent of sales across all kinds of ICT by non-financial sector businesses. The post and telecommunications sector had the largest proportion of businesses selling over the Internet (23 per cent). However, the wholesale, retail, catering and travel sector reported the highest value of sales over the Internet at £49 billion, representing £47 of every £100 sold over the Internet in 2005.
Office for National Statistics

In 2008, 55 per cent of all adults have purchased goods or services over the Internet
Office for National Statistics

By 2015, it's forecast that online sales will account for 11% of total retail spend, and in some sectors such as music and video, Internet spending will be almost 50% of total retail spend by 2015.
The British Council of Shopping Centres