Twitter accounted for 1 in every 170 UK Internet visits yesterday; by our estimations there were over 3.4 million visits to the Twitter homepage from the UK population alone. To put that in context, Twitter received 15% more visits yesterday than it did around the super-injunctions scandal, the previous biggest spike in its UK history.
Somewhat unusually, the spike in traffic to Twitter was not repeated on other social media websites, especially Facebook. Looking at our postcode data helps to explain why this might be. Twitter is used widely across the UK but the most prolific Twitter users are located in London postcodes."