Prioritize measurable SLAs (OTD, order accuracy), scalability of labor and storage, automation for picking/packing, and real-time WMS integrations. Confirm cross-dock capacity, cold-chain availability if needed, and clear returns workflows. Also assess carrier reach for final-mile and LTL corridors into Scotland and northern England.

Strong road and rail links reduce transit miles and carrier handoffs, lowering fuel and time-in-transit costs. Access to Ayrshire ports and Glasgow Airport shortens export lead times. Consider aggregated pallet flows to optimise LTL pricing and regional hub use to reduce per-order landed cost.

Require segmented storage zones: ambient racking for apparel, monitored cold-chain for perishables, and secure, access-controlled areas for high-value electronics. Confirm slotting flexibility, climate monitoring, insurance/valuation terms, and separate picking streams to avoid cross-contamination or damage.

Negotiate clear rate cards for storage, pick/pack, and inbound/outbound handling, with defined surge pricing for peaks. Include KPI-based service credits, minimum notice for labor changes, data access/API connectivity, and exit terms for inventory portability. Ask for sample throughput SLAs and audit rights.