British operator GB Railfreight (GBRf) has reached two important milestones in the process of introducing its new Class 99 bimodal locomotives, marking a crucial step toward their entry into commercial service.
As a result, Network Rail has granted the Class 99 locomotive fleet an interim declaration of compatibility for the British rail network. This approval allows the locomotives to operate on the UK rail network and represents a significant step in the certification process. GBRf and Network Rail will continue to collaborate to obtain full authorization.
In parallel, GBRf has officially taken delivery of the first six Class 99 locomotives for its fleet. This will allow for the expansion of driver training programs before the locomotives enter commercial service this summer.
Electric and diesel traction for greater flexibility
Manufactured by Stadler and developed specifically for the British market, the Class 99 locomotives are bimodal models capable of operating both with overhead catenary power, where infrastructure permits, and with a Stage V-compliant diesel engine on non-electrified lines. This combination provides the flexibility required for national rail freight operations while reducing emissions.
Through the extensive use of electric traction, Class 99 locomotives will have lower emissions and fuel consumption compared to conventional diesel locomotives. In addition, they offer better traction performance, increased reliability, and greater operational flexibility, eliminating the need to change locomotives between electrified and non-electrified routes.
The new Class 99 locomotives will contribute to the decarbonization of rail freight transport while maintaining the level of performance and coverage demanded by customers in the UK.
“Obtaining the declaration of conformity for the Class 99 locomotives is a significant milestone for both the company and the entire UK rail sector,” said John Smith, CEO of GBRf.
According to him, the Class 99 locomotives represent the future of rail freight transport, combining high performance with clear sustainability benefits. Following this approval, the company is now focusing on the actual introduction of the locomotives into commercial service.
In 2022, Stadler Rail and the leasing company Beacon signed a contract for 30 bimodal locomotives to be used by the operator GB Railfreight, with the first two to be delivered in June 2025.
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