In a joint statement they said ‘meaningful negotiations can only take place in the context of a ceasefire or reduction of hostilities’.

The three men, who were in the area at the time of the collision, were arrested on Friday on suspicion of causing death by dangerous driving.

More than 460 people have been arrested for supporting banned group Palestine Action, with a further five detained for assaulting police officers after protesters gathered in central London.

Sarah Yorke, 37, could not be saved after the accident at the Aston-le-Walls Horse Trials in Northamptonshire on Friday.