"The coalition has a steering committee of 33 members. Of these, 18 come from various hard left groups: Communists, Trotskyites, Maoists, and Castrists. Three others belong to the radical wing of the Labour party. There are also eight radical Islamists. The remaining four are leftist ecologists known as "Watermelons" (Green outside, red inside)."
From the very interesting The London Streets - Who are these anti-Bush people?