Here are the details for the London one:
Emergency ProtestsBy the way, second on the google list was Jews sans frontieres.
Sunday 28 December 2.00 pm - 4.00 pm and Monday 29 December 4.00pm – 6.00pm
Both protests opposite Israeli Embassy - Kensington High Street
Nearest tube: High Street Kensington
Protests organised by PSC, Palestine Return Centre (PRC), Palestinian Forum of Britain (PFB), British Muslim Initiative (BMI), Stop the War, Friends of al Aqsa, Muslim Association of Britain (MAB), Respect, Islamic Human Rights Commission.