Border Force officers found about 12 tonnes of cannabis in two shipping containers at Southampton Port on 6 May 2026.[1][2] The cannabis came from Canada, packed in 1,200 boxes.[1][2] The agency called it its largest cannabis seizure; the previous record was just under 8 tonnes (7,955 kg), also at Southampton, in April 2017.[1]

The Home Office put the revenue the load would have generated for organised crime at about £139 million.[1][2]

Home Office intelligence analysts identified the containers before they arrived, working with Canadian partners and UK police.[1] The Canada Border Services Agency had stopped an earlier container of cannabis bound for the UK in April.[1]

On 16 June, officers from the South West Regional Organised Crime Unit arrested three people — two men and one woman in their 30s and 40s, from Merthyr Tydfil, Ebbw Vale and Abertillery in south Wales — on suspicion of facilitating the importations.[1][2] They were held in police custody.[1][2]