Hizb ut-Tahrir, an Islamist movement which wants to establish a global Islamic state, is planning to hold a demonstration outside the Pakistani High Commission on Saturday 26th January.
The group's website says: "Hizb ut Tahrir Britain invites the Muslim community in Britain to attend this demonstration to condemn Musharraf's treachery and British and European hyprocrisy. Make your voices heard across the world as you call for the return of the Khilafah!"
The demonstration is timed to co-incide with the arrival of General Pervez Musharraf in London on Friday.