Latest government figures show that ecommerce surged 39% last year.
A study from the Office for National Statistics puts the total value of online shopping and other web transactions in 2002 at £23.3 billion ($40.2bn; €33.1bn), around 1.2% of all sales.
The sectors attracting most online business were wholesale, retail, catering, travel and telecoms.
Data sourced from: BBC Online Business News (UK); additional content by WARC staff