UK web users spent an average of one in every 12 waking minutes each day online in the first six months of 2013, with advertisers spending a record £3bn targeting them with marketing messages, according to new research.

UK companies increased the amount spent on internet, smartphone and tablet advertising by 17.5% year on year to £3.04bn in the first half of the year.

With this equates to £66 of digital advertising targeted at each of the 46 million regular internet users in the UK, according to the latest report from the Internet Advertising Bureau and PwC, published on Monday.

The growth has been fuelled by the smartphone and tablet revolution which saw ad spend growth of 127% in the first six months to £429m.

The fledgling market for advertising on tablets is estimated at just £10.5m in the first half of the year, although this is up from £2.4m a year ago.

In the past year mobile advertising has doubled its share to 14% of total UK internet ad spend.

"With smartphone penetration crossing the two-thirds [of the UK population] landmark and the successful roll out of 4G, 2013 could be the year when advertising spend on mobile crosses the £1bn threshold," said the IAB director of research and strategy, Tim Elkington.

Of the £3.04bn total internet spend in the first half,online display ads grew by 23% to £738m.

Video advertising grew 86% to £135m, and advertising on social media rose 53% to £242m.

Paid-for search advertising, which is almost completely dominated by Google with about 90% control of the UK market, continued to grow, rising 19% year on year to £1.81bn.

Within this, mobile search advertising has started to gather real pace, up 101% year on year to £271m.

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