Port of Southampton

Last updated 25 May 2026

UK's second-largest container port, operated by Associated British Ports with DP World as container-terminal concessionaire. Anchors the Southampton Corridor for outbound rail flows to inland terminals across the Midlands and the North.

Port of Southampton website

Active since	—
Operating company	Associated British Ports (port authority); DP World Southampton (container terminal concessionaire)
Rail terminals	DP World Southampton (Western Docks) (SOTD107, SOTDED, SOTDWFH, SOTDWGB) Freightliner Maritime Terminal (SOTOMCT)
Branch-line capacity	Southampton Maritime branch — shared access via Millbrook Junction onto the Wessex Main Line
Network constraints	Basingstoke area junction throughput; W10 gauge constraint on alternative Salisbury route
Trailing 12-period A2F	Fewer than 12 closed periods of clean data on record — available once the pipeline reaches 12 complete periods.

Latest period summary

Port of Southampton received 82 monitored inbound services in Period 2 2026-27 — a small monitored sample. 85% of 80 completed arrivals were within 15 minutes of schedule (Wilson 90% interval 77%–90%), against a national freight benchmark of 90%. The reading is consistent with a recovery from Period 1's 73%, though the small sample limits confidence. PRELIMINARY at T+2; FINAL re-publication at T+35 after Network Rail's batch correction.

Full breakdown — P2 2026-27 period report

Reports

Operators calling

Corridors served

Southampton Corridor

Inland destinations

Methodology & sources

All figures derive from Network Rail's NROD TRUST feed, processed via the Gauge Intelligence ingest pipeline. Period definitions, A2F (Arrival to Fifteen), the Wilson 90% interval, daily anomaly rules, cross-view reconciliation, and delay attribution are documented at:

Data window — period boundaries and the data-as-of cutoff
League tables — cross-view reconciliation across the four analytical views
Anomaly detection — daily A2F SPC rules
Delay attribution — DAPR cause-code breakdown
Forecasting — prediction intervals and possession-exposure estimates

The Port of Southampton is the UK’s second-largest deep-sea container port. Associated British Ports owns the harbour estate; DP World operates the principal container terminal at the Western Docks under a long-running concession, with Freightliner running its own maritime intermodal terminal on the same complex. Outbound rail freight runs north via the Southampton Maritime branch and onto the Southampton Corridor to inland terminals in the West Midlands and the North.

Commercial licence

Four derivations are released to commercial-licence subscribers rather than the public archive. Each one reconciles TRUST source-data against Network Rail's Historic Delay Attribution record independently, not republished from public statistics.

Available under commercial licence. Contact [email protected] for subscription terms.