GB Railfreight clears key milestone for Class 99 rollout following network approval

GB Railfreight (GBRf) is set to accelerate the introduction of its new Class 99 bi-mode locomotives after securing network acceptance from Network Rail.

The operator received Network Rail Summary of Compatibility (NRSC) approval for the Stadler-built electro-diesel fleet on 30 April, marking a significant step forward in bringing the locomotives into operational service.

With compatibility now confirmed, the Class 99 fleet is no longer restricted to testing and can be deployed across the network, subject to standard route limitations. This opens the door for GBRf to begin using the locomotives on a wider range of services.

However, a comprehensive driver training programme is still underway, meaning the new units are not expected to enter full revenue service for several more weeks.

Fleet deliveries are continuing, with the latest locomotive, 99007, arriving at Portbury Docks on 24 April. Unlike previous shipments, which arrived in pairs, this delivery included a single unit due to an issue affecting locomotive 99008, which remained overseas.

Further deliveries are expected in the coming months, with 99008 and 99009 due in mid-May, followed by 99010 and 99011 in June. The newly arrived locomotive has since been transferred to Leicester, joining others already in the UK.

GBRf has also confirmed that a portion of the fleet—six locomotives equipped with Electric Train Supply (ETS)—will be allocated for use on luxury services operated by Belmond, including the Royal Scotsman and Britannic Explorer.

The Class 99 programme represents a major investment in modern, flexible traction, combining electric and diesel capability to support freight operations across both electrified and non-electrified routes.