I just wondered if any of you have come across any good websites detailing statistics & percentage market share of the types of phones people are using at the moment?

It is really easy to find on the web the number of people in the UK using Internet Explorer, compared to say Chrome. So along the same lines I'm looking to find up-to-date information on what specific mobile devices people in the UK are using.

I've managed to find a broad spectrum for example xx% Android versus xx% iPhone, however I'm trying to find a breakdown of the say top 20 devices that are being used? iPhone4, Samsung II, HTC etc.

Thanks in advance.