“If there are reasonable grounds for suspecting that a person is someone in respect of whom directions may be given … [that he be deported]…, that person may be detained under the authority of an immigration officer pending – (a) a decision whether or not to give such direction; (b) his removal in pursuance of such directions.”
“[A chief immigration officer] or an adjudicator may release a person… [detained under paragraph 16(1), (1A) or (2)] on his entry into a recognisance… conditioned for his appearance before an immigration officer at a time and place named in the recognisance… or at such other time and place as may in the mean time be notified to him in writing by an immigration officer.”
“…as the power is given in order to enable the machinery of deportation to be carried out… the power of detention [is] impliedly limited to a period which is reasonably necessary for that purpose. The period which is reasonable will depend upon the circumstances of the particular case.”
“Plainly it may become unreasonable actually to detain the person pending a long delayed removal (i.e. throughout the whole period until removal is finally achieved). But that does not mean that the power has lapsed.”
“there must be strong grounds for believing that a person will not comply with conditions of temporary admission or temporary release for detention to be justified”, and detention “must be kept under close review to ensure that it continues to be justified”
“Where proceedings have been initiated which challenge the right to remove an immigrant, it is not the policy of the Secretary of State to detain an immigrant on the ground that his removal is imminent. Normally, in such circumstances he will be granted temporary admission pending the result of those proceedings.”
“… when deciding whether removal is imminent the immigration service will pay no regard to a statement by the immigrant, or those representing the immigrant, that proceedings challenging the right to remove the immigrant will be initiated.”
“nothing in [the] policy suggests, however, that removal will not be treated as imminent merely because there has been an intimation that suspensive proceedings will be commenced.”
“Those acting for the detained immigrants in that case had given notice of their intention to seek judicial review. The court stated that, having regard to those aspects of the policy that had been made public, they could reasonably expect, that the immigrants would not be detained on the ground that their removal was imminent. “The only basis upon which the Immigration Service could treat [their] removal as imminent was by applying that aspect of the … policy which had not been made public, namely that no regard would be paid to an intimation that judicial review proceedings would be instituted. The Secretary of State cannot rely upon this aspect of his policy as rendering lawful that which was, on the face of it, at odds with his policy, as made public”