All is explained in the video. Here is a brief summary of what is to be found on the great google... A rather broader definition put forward by Lord Denning in R v Chief Constable of Devon and Cornwall, ex parte Central Electricity Generating Board [1982] Q.B. 458 (at 471) to the effect that the mere physical obstruction of a person lawfully going about his business could in itself amount to a breach of the peace, without the need for any violence to have been caused or to be likely, has not received support in any later cases. The definition used in Howell is as follows ([1982] QB 416, 427): "We are emboldened to say that there is a breach of the peace whenever harm is actually done or is likely to be done to a person or in his presence his property or a person is in fear of being so harmed through an assault, an affray, a riot, unlawful assembly or other disturbance." Thanks to Julian for filming and joining in. ... https://www.youtube.com/watch?v=ppk6DLA9p3c