s 70 Abscondment from residential establishments.
If a child who is required by a supervision requirement to reside in a residential establishment— (a) absconds from the establishment in which he resides; or (b) absconds from any hospital or other institution in which he is temporarily residing; or (c) being absent on leave from the residential establishment, either runs away from the person in whose charge he is or fails to return to the establishment at the end of his leave; he may be arrested without a warrant in any part of the United Kingdom or the Channel Islands and brought back— (i) in a case falling within paragraph (b) to the place from which he absconded; or (ii) where he has run away from the person mentioned in paragraph (c), to that person; or (iii) in any case, to the residential establishment ; and a court, if satisfied that there are reasonable grounds for believing that the child is within any premises, may grant a search warrant authorising a constable to search those premises for the child.