Arrests and prosecutions that relied on the proscription face immediate legal challenge, raising the likelihood of dropped charges, appeals, and compensation claims for affected individuals. UK policing and prosecutors must pause or re-scope enforcement actions tied to “membership/support” offences while the case proceeds to a final decision. Organisations and employers that treated affiliation with Palestine Action as a terrorism-linked compliance issue will need to reassess screening, disciplinary actions, and risk policies under UK counterterror rules.