Facebook continues to be the outright leader in social networking sites in the UK, with far more users than its competitors; Twitter, Flickr, MySpace, and Linkedin:

(Figures from June 2010)

Facebook currently has over 25,000,000 active users in the UK (August 2010), that’s approximately 45% of the population. Further statistics and demographic breakdown of Facebook users follows below.

(Above graphs based on figures for August 2010)

What’s more, these millions of users are now spending more time on Facebook each month than ever before:

(Comparing average time spent in June 2010 to June 2009)

This has meant that overall the average length of time users spend on a typical visit to Facebook is by far the longest of the top 3 sites:

(Figures from August 2010)

Sources: BBC, Facebook, Google – public data, Alexa.