Veteran peace protester Brian Haw, who has been living in the square since 2001, has not been served a letter as his camp is on the green which comes under the remit of the Greater London Authority.
Thousands of pilgrims wave palms and olive branches, symbols of peace, to be blessed by the pope as he leads a procession around the square before delivering mass outside.
Our attempts to square circles by agreeing to compromise on our rights in exchange for promises of support and peace have brought us to the point where Israel's very legitimacy is being called into question throughout the world.