“The requirement of imminence is relatively clear-cut and appropriately identifies the common law power (or duty) of any citizen including the police to take preventive action as a power of last resort catering for situations about to descend into violence. That is not to suggest that imminence falls to be judged in absolute and purely temporal terms, according to some measure of minutes. What is imminent has to be judged in the context under consideration, and the absence of any further opportunity to take preventive action may thus have relevance.”
“I agree with your Lordships that the imminence or immediacy of the threat to the peace is an essential condition, which should not be diluted. As Lord Rodger has pointed out, para 67, the test has to be applied in the conditions of today, which may include the availability of better information to police officers on the ground about the way in which events are unfolding. I do consider, however, that it can properly be applied with a degree of flexibility which recognises the relevance of the circumstances of the case. In particular it seems to me rational and principled to accept that where events are building up inexorably to a breach of the peace it may be possible to regard it as imminent at an earlier stage temporarily than in the case of other more spontaneous breaches.”
“The closest parallel to the present case is Moss v McLachlan[1985] IRLR 76 , a test case brought by the National Union of Mineworkers to clarify the law on police road blocks. These were in widespread use during the miners’ strike which was in progress at the time. In April 1984 the police stopped cars carrying striking miners as they left the motorway at a point near four collieries in the Nottingham coalfield where work was continuing. The miners in the cars were intending to picket one or more of the pits. Two of the pits were between a mile and a half and two miles from the exit, while the two others were between four and five miles away. In the atmosphere of the time, and in view of previous events, it was easy for senior police officers to foresee that, if the striking miners reached the working pits, at some point there would be violent clashes between the striking and working miners. They therefore set up a police cordon at the motorway exit so as to be in a position to avert any clashes by keeping the two forces apart. When the striking miners tried to break through the cordon, they were arrested and charged with obstructing a police officer in the execution of his duty in contravention ofsection 51(3) of the Police Act 1964 . The miners were convicted and, on appeal, contended that the officers at the cordon had not been acting in the execution of their duty since no breach of the peace was imminent at the motorway exit and therefore the officers had no power to stop them at that point. In a reserved judgment the Divisional Court rejected the argument. In my view they were right to do so, even though, as I have already pointed out, their reasoning was flawed in an important respect. I consider that, as Skinner J held[1985] IRLR 76 , 79 and para 27, the justices were entitled to hold that in all the circumstances, because of the proximity of the pits and the availability of cars, a breach of the peace was “imminent, immediate and not remote”
“The police are under a duty to keep the peace when a riot is threatened, and to take reasonable steps to prevent serious public disorder, especially if it involves violence to individuals and property. Any sensible person living in a modern democracy would reasonably expect to be confined, or at least accept that it was proper that she could be confined, within a limited space by the police, in some circumstances. Thus, if a deranged or drunk person was on the loose with a gun in a building, the police would be entitled, indeed expected, to ensure that, possibly for many hours, members of the public were confined to where they were, even if it was in a pretty small room with a number of other people. Equally, where there are groups of supporters of opposing teams at a football match, the police routinely, and obviously properly, ensure that, in order to avoid violence and mayhem, the two groups are kept apart; this often involves confining one or both of the groups within a relatively small space for a not insignificant period. Or if there is an accident on a motorway, it is common, and again proper, for the police to require drivers and passengers to remain in their stationary motor vehicles, often for more than an hour or two. In all such cases, the police would be confining individuals for their own protection and to prevent violence to people or property. So, too, as I see it, where there is a demonstration, particularly one attended by a justified expectation of substantial disorder and violence, the police must be expected, indeed sometimes required, to take steps to ensure that such disorder and violence do not occur, or, at least, are confined to a minimum. Such steps must often involve restraining the movement of the demonstrators, and sometimes of those members of the public unintentionally caught up in the demonstration. In some instances, that must involve people being confined to a relatively small space for some time. In such cases, it seems to me unrealistic to contend that article 5 can come into play at all, provided, and it is a very important proviso, that the actions of the police are proportionate and reasonable, and any confinement is restricted to a reasonable minimum, as to discomfort and as to time, as is necessary for the relevant purpose, namely the prevention of serious public disorder and violence.”