The depot will be designed to ensure maximum availability and reliability of the fleet, will vastly improve the working environment and become home to a wide range of activities, including preventative and corrective maintenance, overhauls and train presentation. There will be storage for spare parts and material supplies and office space for training and other support functions.

With inspection roads and pits, cranes, jacks, test facilities and a wheel-lathe, the 12-acre site, close to Regent Centre station, will feature a wash-plant to clean train exteriors and other dedicated areas for both daily and periodic deep-cleaning. The outside area will be adapted to optimise train movements, while keeping noise to a minimum for the benefit of local residents.

The building has been designed to ensure maximum sustainability and to provide an attractive environment for employees. It will make best use of natural light, and all workspaces will have windows. Energy efficient lighting will be installed throughout the premises and solar panels on the roof will reduce overall energy consumption. Water recycled on site and rainwater will be harvested and used for train washing facilities and toilets. There will be a dedicated, secure area for bikes, and showers will be provided for people cycling to and from work.

The project will involve the safe demolition of the old depot, open since 1923, clearing the site, followed by re-building the new depot. Work is scheduled to begin later in the year, with most of the building work set to be completed by 2025. The planning has been configured to enable the legacy fleet to continue successfully operating from the depot, while the construction work takes place.