As it happened though they have had grounds for their suspicions as in carrying lock on devices or carrying paint. And it wasn’t before they “even go anywhere” they arrested them along the Coronation route
Do you actually know the new law?
Public Order Act 2023 (legislation.gov.uk)
A person commits an offence if they have an object with them in a place other than a dwelling with the intention that it may be used in the course of or in connection with the commission by any person of an offence under section 1(1) (offence of locking on).
(2)A person who commits an offence under subsection (1) is liable on summary conviction to a fine.
(3)In this section “dwelling” has the same meaning as in section 1.
So carrying a bike lock could be an offence
Powers to stop and search without suspicion(1)This section applies if a police officer of or above the rank of inspector reasonably believes—
(a)that any of the following offences may be committed in any locality within the officer’s police area—
(i)an offence under section 137 of the Highways Act 1980 (wilful obstruction) involving activity which causes or is capable of causing serious disruption to two or more individuals or to an organisation;
(ii)an offence under section 78 of the Police, Crime, Sentencing and Courts Act 2022 (intentionally or recklessly causing public nuisance);
(iii)an offence under section 1 (offence of locking on);
(iv)an offence under section 3 (offence of causing serious disruption by tunnelling);
(v)an offence under section 4 (offence of causing serious disruption by being present in a tunnel);
(vi)an offence under section 6 (obstruction etc of major transport works);
(vii)an offence under section 7 (interference with use or operation of key national infrastructure), or
(b)that persons are carrying prohibited objects in any locality within the officer’s police area.
(2)In this section “prohibited object” means an object which—
(a)is made or adapted for use in the course of or in connection with an offence within subsection (1)(a), or
(b)is intended by the person having it with them for such use by them or by some other person,
and for the purposes of this section a person carries a prohibited object if they have it in their possession
So they can stop and search without suspicion, just as long as they reasonably believe they might cause an offence