VolkerFitzpatrick are contracted by Siemens to design, build and commission two new train maintenance depots at Hornsey in north London and Three Bridges near Crawley in West Sussex. The new depot at Three Bridges includes a five road 12 car maintenance building. The Hornsey depot includes the widening of two existing bridges, a new three road 12 car maintenance shed, two carriage washing machines, offices and all associated depot infrastructure. Both new depots are being built within a live operational rail environment adjacent to the East Coast mainline. Concast are providing a Precast insulated sandwich panel solution to remove all blockwork at both Three Bridges and Hornsey along with Precast ground beams, retaining walls, stairs and “swimming pool” maintenance pits.