The strikes by Unite members will be held from 13 to 15 October, 20 to 22 October, 27 to 29 October, 3 to 5 November and 10 to 12 November.

Unite general secretary Sharon Graham said: ‘Rather than negotiating in good faith, GXO has threatened it will remove the original offer it made. Let me be clear – our members will not be threatened into backing down. They have Unite's 100% support in striking for a fair pay rise.'

Members rejected a 4% offer from GXO, which runs the NHS supply chain contract for Supply Chain Coordination Limited (SCCL). SCCL is wholly owned by NHS England.

A GXO spokesperson said: ‘We are disappointed that Unite members working on the NHS Supply Chain contract have voted in favour of industrial action.

‘We remain committed to constructive discussions with Unite representatives and ACAS and continue to believe that the pay offer presented is fair, competitive and sustainable. Our priority remains supporting our colleagues and maintaining open and constructive dialogue as we seek a resolution.

‘We have robust contingency plans in place and are working closely with NHS Supply Chain and other relevant stakeholders to minimise any disruption and maintain continuity of service. Patient care remains of paramount importance, and we remain focused on providing a safe and effective operation throughout this period.'

An NHS Supply Chain spokesperson said: ‘We are aware of the outcome of the Unite ballot involving their members who work as drivers for our logistics provider, GXO, on the NHS Supply Chain contract, and the announcement of industrial action.

‘Together with GXO, our priority is to ensure the continued supply of vital products to the NHS. GXO has robust contingency plans in place to help minimise any potential disruption whilst discussions continue.'