UK Port Performance 2025: Felixstowe, Southampton, and London Gateway Under Pressure

The UK's Container Port Landscape#

The UK handles approximately 10 million TEUs of container traffic per year through a concentrated network of major ports. Felixstowe in Suffolk handles roughly 38% of the UK's container throughput — around 3.7-4 million TEUs per year — making it the dominant entry point for imports from Asia and the rest of the world. Southampton is the second-largest container port, handling approximately 1.5-2 million TEUs per year, with particular strength in automotive imports and exports. London Gateway, operated by DP World, is newer and growing, handling around 750,000-900,000 TEUs annually, with significant logistics park infrastructure adjacent to the port. Tilbury handles additional container and general cargo volumes. The concentration of UK container trade through Felixstowe creates a specific resilience risk: any performance degradation at Felixstowe has outsized national consequences.

How Red Sea Rerouting Has Created Schedule Disruption#

The Cape of Good Hope rerouting of Asia-Europe shipping has introduced significant schedule unreliability at UK ports. When vessels travel longer routes, their arrival times become harder to predict — weather events, bunkering stops, and congestion at intermediate ports all create variance that accumulates over a longer voyage. Port terminals plan berth allocation, crane scheduling, and haulage based on predicted vessel arrival windows. When multiple vessels arrive simultaneously because of schedule bunching — a common effect of disrupted rotations — terminals face rapid increases in inbound volume that can overwhelm processing capacity. The result is extended dwell times: containers sitting on the quayside waiting for customs clearance, inland haulage pickup, or simply space in the container yard.

Dwell Times and What They Cost You#

Dwell time — the number of days a container sits at a port between vessel discharge and collection — has a direct cost for importers. Shipping lines charge demurrage (a daily fee for containers held beyond the free period, typically 3-7 days) and detention (a daily fee for containers held outside the port beyond their return deadline). Demurrage rates at UK ports run from £100-300 per container per day depending on the shipping line and container size; detention rates are similar. During periods of port congestion, when haulage capacity is tight and free periods run out before containers can be collected, demurrage charges can add hundreds or thousands of pounds to a single shipment's cost. These charges are often buried in freight invoices and not scrutinised by importers — but they represent a real and manageable cost.

Inland Haulage Constraints: The Last Mile Problem#

Port congestion is often not a port problem — it is a haulage problem. The UK has faced a structural shortage of HGV drivers since Brexit, when EU drivers who could legally work in the UK under freedom of movement returned or chose not to come. The driver shortage has eased from its 2021-22 peak (when the shortage was estimated at 100,000 drivers) but has not been fully resolved. During periods of port vessel bunching, the simultaneous demand for haulage from multiple delayed vessels can exhaust available driver capacity in port regions, extending dwell times even when the port itself is not at capacity. For importers, building relationships with multiple hauliers and maintaining flexibility on collection windows helps mitigate this risk.

Post-BTOM Customs Processing: New Variable in UK Port Performance#

The implementation of full BTOM customs controls has added a new variable to UK port processing times, particularly for goods requiring documentary checks, identity checks, or physical examination at Border Control Posts (BCPs). For food, plant, and animal products, the need for physical inspection creates bottlenecks at BCPs that have fixed inspection bay capacity. During peak periods — particularly for fresh food in summer — BCP queues can extend processing times significantly. Importers of regulated goods should factor inspection time variability into their delivery windows and communicate this to customers, particularly for time-sensitive products.

How Port Performance Affects Your Landed Cost#

Port performance affects landed cost through four channels: demurrage and detention charges when containers dwell beyond free periods; storage costs if goods need to be devanned and warehoused while awaiting inland transport; expediting costs if delays require alternative arrangements to maintain customer supply; and inventory carrying costs when delivery unpredictability forces higher safety stock levels. Most importers underestimate the aggregate of these costs because they appear in different invoice categories and are not totalled against a specific shipment's landed cost. AskBiz's dashboard consolidates these cost components into a single landed cost view per shipment, so the full cost of a port congestion event is visible rather than hidden across multiple invoices.

• The UK's three major container ports — Felixstowe, Southampton, and London Gateway — have faced intermittent congestion driven by Red Sea rerouting schedule disruption, post-BTOM customs control processing, and industrial action.
• Dwell times, vessel bunching, and inland haulage capacity constraints directly affect landed costs and inventory planning.