The Week: Online News - Microsoft tops web findings

Microsoft is the UK's most prolific online advertiser, according to new figures from Nielsen NetRatings.

The computer giant, which ran 104 UK campaigns last year, was followed by HP, with 75 campaigns, and O2, with 67 campaigns. Orange, Sky, BT and Barclays also featured in the top 20 UK online advertisers, which together account for 7 per cent of all campaigns.