they might have a contract with AZ, but it's very likely to be the wrong AZ... instead of AstraZeneca plc (.uk parent company) their contract is with AstraZene

they might have a contract with AZ, but it's very likely to be the wrong AZ... instead of AstraZeneca plc (.uk parent company) their contract is with AstraZeneca AB (.se subsidiary) the UK vaccine operation will be under the control of AB plc I would bet the commission insisted on having it with an EU entity without having thought the ramifications