IN Brief:
- Tesco workers at Belfast, Didcot, Doncaster, and Thurrock are being balloted for strike action.
- The ballot covers more than 3,000 warehouse employees and drivers and is due to close on 17 August.
- Any disruption would place additional pressure on chilled, short life, and promotion driven food flows, although Tesco says contingency plans are in place.
Tesco faces a strike ballot involving more than 3,000 warehouse employees and HGV drivers across distribution operations in Belfast, Didcot, Doncaster, and Thurrock.
The Unite ballot concerns pay and is due to close on 17 August. Workers have rejected a proposed 4% increase and are seeking treatment comparable with store employees, who received a 5.1% rise.
Approximately 1,400 workers at Thurrock, 700 at Didcot, 600 at Doncaster, and 400 at Belfast could take part in industrial action if the ballot produces a legal mandate and negotiations do not resolve the dispute.
No strike dates have been announced, and a vote in favour of action would still leave time for further talks, statutory notice, and decisions over the locations, employee groups, and dates involved.
Tesco has said its offer is above inflation and that established contingency plans are available to protect stock availability. The retailer reported adjusted operating profit of £3.2bn for 2025/26 and expects between £3bn and £3.3bn during 2026/27.
Each affected site forms an important node within the retailer’s national distribution network, receiving products from manufacturers and import routes before assembling store orders. Temperature controlled zones, vehicle movements, picking operations, and dispatch windows are closely coordinated around daily demand.
Disruption need not close a depot completely before service levels begin to fall. Reduced staffing can slow inbound unloading, order picking, loading, yard management, vehicle turnaround, and the recovery of reusable trays, cages, and pallets, gradually reducing the volume available to stores.
Short life production carries limited slack
Chilled, fresh, and date sensitive suppliers commonly manufacture against daily retailer orders, dispatching finished goods soon after packing to preserve shelf life and minimise factory storage. A late change to depot appointments can arrive after raw materials have been prepared, packaging issued, labour scheduled, and line changeovers completed.
Ambient manufacturers have more scope to hold stock, although warehouses and factories still have finite space. Promotional goods, retailer specific cases, and private label products cannot always be redirected to another customer when their intended depot reduces intake.
Morrisons avoided a northern distribution strike after concessions were agreed with drivers, demonstrating how a ballot can intensify negotiations without ultimately interrupting deliveries. Tesco and Unite retain the same opportunity before the voting and notice process concludes.
Contingency measures may include routing volume through alternative depots, using managers or employees not taking action, revising delivery frequency, prioritising essential lines, increasing direct to store supply, or securing additional transport. Each option transfers work and can expose another constraint within the network.
Diverting goods changes mileage, booking systems, pallet configuration, order composition, and driver schedules. A depot operating normally may still lack spare chilled space, picking capacity, loading doors, or yard access to absorb a large additional volume at short notice.
Manufacturers can reduce exposure by reviewing depot mapping, customer forecasts, available shelf life, stock positions, and production flexibility before the ballot closes. Close contact with retail planning teams is especially important for weekend peaks, promotions, and lines whose recipes or packaging prevent transfer between customers.
Reusable equipment may create another bottleneck because trays, dollies, cages, and pallets circulate through retail depots. Slower returns can leave suppliers without enough assets to pack or dispatch later production, even when their outbound deliveries continue.
Temperature control must also be maintained through any revised route. Additional dwell time, unfamiliar cross docking arrangements, or congested marshalling areas can consume shelf life and increase the monitoring burden on chilled and frozen loads.
Large distribution centres depend on trained warehouse and driving employees who understand automation, temperature controls, vehicle movements, product rotation, safety systems, and site specific exceptions. Replacing that knowledge at short notice is difficult, particularly where agency workers require induction or licences.
Automation reduces some manual tasks without removing labour dependency. Storage systems, sorters, conveyors, and pick technology still require loading, replenishment, control room oversight, maintenance, exception handling, and recovery when equipment or products fall outside normal parameters.
Industrial action can also alter order patterns before the first planned strike day. Retailers may build stock, move promotions, reduce range, or order earlier, creating a short demand surge for factories and transport providers followed by a lull if action proceeds.
The ballot remains a negotiation stage rather than a confirmed interruption, and Tesco maintains that availability will be protected. More than 3,000 employees are nevertheless concentrated across four significant sites, giving both sides a limited period to settle the dispute before contingency planning moves into live operation.
