參考案例Semple v DPP  EWHC 3241 (Admin),  PTSR 111 (DC) para 13，Hickinbottom J指「警員在沒有擾亂秩序及使用暴力的可能的情況下，沒有任何職責去協助物業擁有人去驅趕侵入者。」
Tonight, the police took the extreme course of entering University premises, for reasons as yet unexplained. They did so despite the fact that the students had explicitly disavowed any intention to act violently.
Even if the students could, somehow, be regarded as trespassers, ‘a constable is not under any duty to assist a premises owner to evict a trespasser absent a risk of a breach of the peace or risk of violence.’ (Semple v DPP  EWHC 3241 (Admin),  PTSR 111 (DC) para 13 per Hickinbottom J ).
In other words, the police were not acting in the execution of their duties at the time, but they were (arguably unlawfully) acting as if they were the University’s servants. In the premises, any restraint they put on the students was not cloaked in lawful authority, and would have amounted to assault, battery and/or false imprisonment.