1984 Police & Criminal Evidence Act C.60 – clause 22 2(a)(4) regarding seizure & retention
Retention. 22. — (1) Subject to subsection (4) below, anything which has been seized by a constable or taken away by a constable following a requirement made by virtue of section 19 or 20 above may be retained so long as is necessary in all the circumstances.
(2) Without prejudice to the generality of subsection (1) above—
(i) for use as evidence at a trial for an offence; or
(ii) for forensic examination or for investigation in connection with an offence; and
(3) Nothing seized on the ground that it may be used—
may be retained when the person from whom it was seized is no longer in police detention or the custody of a court or is in the custody of a court but has been released on bail.
(4) Nothing may be retained for either of the purposes mentioned in subsection (2)(a) above if a photograph or copy would be sufficient for that purpose.
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