1.11pm: Twitter had already been blocked in Egypt, forcing people to use alternative IP addresses. Now Facebook, which hosts the popular opposition movement pages We are all Khaled Said and the April 6 Youth Movement, has also reportedly been blocked.
1.04pm: The Egyptian consulate in Britain was more forthcoming than the UK Home Office (see 12.38pm) on the reports that Gamal Mubarak (son of Hosni) and his family have fled to London amid the protests, my colleague Sam Jones tells me. A spokesman said to him:
We deny it. I assume he is in Cairo, but he's not in London. That's the truth of the matter.
The spokesman, who said the reports had originated on the US-based website, Akhbar Al-Arab, would not comment on whether Gamal Mubarak had any plans to flee Egypt.