Client: CAF Rail Services The CAF Class 197 trains are part of Transport for Wales' investment in its rolling stock, aimed at transforming rail services across Wales and the Borders. These 77 brand-new diesel multiple units (DMUs) are designed to operate on long-distance routes, including the North Wales Coast, Cambrian Line, and Marches Line. Alongside the new fleet, major infrastructure upgrades have been carried out to ensure the safe and efficient operation of these wider, modern trains. These upgrades include gauge clearance, which involves modifying platforms, tunnels, and bridges, and raising platform heights to improve accessibility and passenger safety. Services we provided Rail Engineering Building Surveying Project, Cost & Commercial Management Our Role BWB played a pivotal role in preparing the Wales and Borders region for the new Class 197 trains by providing a comprehensive suite of multi-disciplinary services. Working closely with CAF, our team identified the essential infrastructure modifications needed for seamless train operations, addressing the specific requirements for track design, civil engineering, and principal design. In-depth analysis Our project began with an in-depth scoping of existing infrastructure across over 20 sites, identifying critical areas such as station platforms, tunnels, and lineside equipment that required modifications to accommodate the wider, modern Class 197 rolling stock. Using niche gauging software, we conducted a detailed analysis to determine where structural clearances were required and presented viable, cost-effective solutions through close collaboration with the client, operator, and contractor. Platform redesigns Our engineering solutions included the redesign of four platforms, one bridge, and two tunnels, ensuring the new trains could operate safely and efficiently within network constraints. Beyond technical design, BWB managed key responsibilities under the CDM (Construction Design and Management) Regulations, acting as the Contractor's Engineering Manager (CEM) and Principal Designer (PD). We produced detailed CDM plans, assessed site hazards, and coordinated pre-construction information, which included health and safety files, utility mapping, and unexploded ordnance data. Precise engineering Through precise planning and extensive design, BWB’s involvement ensured that infrastructure upgrades met both safety and operational requirements, ultimately enabling the new Class 197 fleet to enhance connectivity and the passenger experience across Wales and the Borders.