With Twitter (or microblogging as it used to be called) celebrating its fifth anniversary today (21st March) here are some random statistics courtesy Virgin Media Business…

• Currently 35% of organisations in the UK are using social networking sites as part of their external communications, with one in ten firms now tweeting regularly.

• A poll of 5000 UK businesses found that Twitter is most popular with legal organisations, with 12% regularly using the social network for business purposes. (Really? – Ed)

• Twitter is the most popular social networking site for businesses in the North West, Northern Ireland and the North East, where it is used by 12% of all companies. Welsh firms are least likely to use Twitter, with just 7% currently signed up to the service.