In this report we outline the current state and likely development of the war between mobile platforms. We discuss installed bases and activity levels, the key issues facing Apple and Android, including Android fragmentation and Google's acquisition of Motorola, and go on to look at the tablet market and the outlook for RIM, Nokia and Windows Phone.

Revenues and profits continue to crash at the directory giant as local and small business expenditure shifts to cheaper online media

We believe Yell’s challenges may be less about share of voice, and more about how to absorb the pace of structural change – and to operate its business effectively from a much lower top-line

Tough conditions in all territories – UK, US, Spain and Latin America – have accelerated structural change, but Yell has some advantages over the start-ups, search algorithms and social networks that surround it

Microsoft’s new Windows Phone 7 operating system is launching with a big bang: ten handsets, eighteen operators, and a massive marketing campaign

The OS itself is positioned firmly in between iPhone and Android in terms of ease-of-use and customisability; it is as fast as the best-in-class but no faster; and its interface is bold but will not be to everybody’s taste

A lack of apps, limited distribution, and expensive handsets will likely limit sales in the short term. Longer term, being late in the game with no truly compelling unique feature will make building a major position very challenging, but not impossible

We forecast UK online advertising to grow by 8% CAGR to £5.1 billion by 2014, representing approx. 33% of total advertising spend, overtaking press

Search is the main growth engine, which we predict will reach £3.1 billion in 2014, due to its appeal and value to advertisers as a sales and lead generation tool

Growth in spend on social media and video networks will push online display to just over £1 billion by 2014; whilst classifieds will grow to £840 million

Yell UK is the dominant supplier of Classified Advertising Directory Services (CDAS) in the UK. Its principal competitor is BT but, as a natural monopoly, it is regulated, and has just undergone a sector review lifting the price caps currently in place. What does the future now hold for Yell, and more generally for CDAS, which has been the only growth sector in print classified advertising since 2004?