There is a wealth of interesting market share data available from the latest edition of Experian Hitwise, the regular analysis of changing activity across different social networks. The big winner in the latest figures appears to be You Tube - which according to Experian had its biggest ever month of traffic as 606 million UK Internet visits went to the website in December 2011. YouTube now accounts for 1 in every 4 visits to a social network in the UK and 1 in every 30 visits online.

Facebook’s share of visits to social networks has declined from 58% in December 2010 to 51% in December 2011. Does this tally with your own experience? Twitter’s share remains below 3% and Google + doesnt even make the top ten of social networks at the moment. More here from the Daily Telegraph. Facebook’s share of UK social networking declines