Prioritise inventory accuracy, pick-and-pack throughput, returns processing, and technology integration (WMS + OMS APIs). Also evaluate carrier connectivity, SLA guarantees, peak-season flex space, and local labour availability to ensure reliable omnichannel fulfilment.

A Merton-based 3PL shortens delivery distances into central and south-west London, lowering fuel and zone surcharges while enabling faster cut-offs for same-day or next-day services. Consolidation opportunities and dense carrier networks further reduce per-shipment costs.

Negotiate clear KPIs for inventory accuracy, order lead time, on-time delivery and chargeback thresholds. Include scalable space/pricing clauses for peak periods, implementation timelines, data access (real-time reporting) and exit or service-transfer provisions to reduce operational risk.