On June 21, the 12-car train, which can carry up to 1750 passengers, made a further nine trips on the route, and operation of the class 700s is due to be extended north through the Thameslink core section to Bedford next week.

The new trains, which are being introduced as part of the £6.5bn Thameslink upgrade, will give passengers additional capacity with longer trains throughout rush hour, creating at least 1000 extra standard class seats.

This fleet of 55 12-car and 60 8-car trains will run on an expanded Thameslink network to additional destinations including Peterborough and Cambridge.

The train's features include wider doors and aisles, extra luggage space, air-conditioning, electronic signage indicating space, space for full-sized bikes in the off-peak, fully-accessible disabled toilets, and baby changing facilities.