Mossend — Period 1 2026-27 (29 March – 25 April) report

Operators at Mossend-inbound

GB Railfreight ran the most mossend-inbound services in Period 1 2026-27 (28 of 73 completed arrivals). The full per-operator reliability comparison is deferred while the v1.0 industry review edition corrections inbox remains open.

Publishing a per-operator on-time comparison for the busiest freight operators at a single destination before the launch-cohort corrections cycle closes would treat provisional attribution as settled. The table returns at v2.0 general availability. The league-table methodology documents the comparison framework; the release cadence page sets out the four exit criteria for v2.0.

Source: Gauge Intelligence NROD-derived journey data, Period 1 2026-27. Single-destination headline figures (completed arrivals, aggregate within-15-minute rate, cancellations) continue to appear in the panels above; the per-operator breakdown is the panel deferred here.

What the 15-minute threshold hides

Half of Period 1 2026-27 services arrived within +1 min of timetable. The long tail the A2F binary misses: 5% of services ran +75 min or more late, and 1% arrived over +105 min late. The 15-minute A2F threshold sits at the 82th percentile — 18% of services exceeded it.

Median arrival delay is 2 minutes later than Period 13 2025-26 (median was -1 min then, 1 min now).

73 services with confirmed terminal arrival in Period 1 2026-27. A2F is binary at 15 minutes — this distribution surfaces what the headline figure does not show. National 99th percentile across all freight operators: 100 min.

Baseline (Period 13 2025-26): median -1 min, p99 +182 min. Period-on-period median shift +2 min.

ORR's Freight rail usage and performance release publishes by Network Rail region and route, not by operator. This page publishes by operator and corridor.

Cancellation rate

In Period 1 2026-27, 17% of scheduled services were cancelled (19 of 113) — 9.5pp above the national mean of 7% across all freight operators; FOC traction, crew, and terminal decisions accounted for the largest share.

Cancellations are down 5.50 percentage points on Period 13 2025-26 (22% then, 17% now). The largest shifts in the responsible-party split are reported in the table below.

Attribution

Cancellation rate in Period 13 2025-26 was 22% across 148 scheduled paths. The current period is down 5.50 percentage points on Period 13 2025-26.

Source: NROD/TRUST activation feed and BPLAN scheduled paths, Period 1 2026-27. Cancellation rate = (post-activation + pre-activation cancellations) ÷ scheduled or activated paths. Pre-activation cancellations are TRUST CANCEL messages on schedules that never activated; post-activation cancellations have an activation and a CANCEL event. The bracketed range beside the headline rate is the 90% confidence range on the cancellation proportion given the sample size. Cause attribution uses the responsible-party mapping of the recorded cancellation reason code; see delay-attribution methodology.

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

Three further reads sit behind the commercial licence: a Schedule 8 net-position figure netting the FOC-to-Network-Rail differential against payments the other way; a full DAPR breakdown attributing each cause-code's contribution by sample weight; and a Schedule 4 possession-exposure read tracing how planned blockades intersect terminal-bound path allocation. None is yet substantively informative at Mossend's current baseline depth — the period count that suppresses the SPC chart above leaves each licensed read with too few points to anchor. The licensed access page sets out the methodology behind each.