THE OPEN-PLAN TUBE CARRIAGE
The S-Stock train that was targeted by the bomber yesterday can carry almost 1,000 people – most of them standing.
They were the first London Underground trains to have ‘walk-through’ carriages – which means they have no connecting doors.
The new rolling stock replaced ageing Tube trains on the District Line – which had separate carriages and were built in the 1970s and 1980s.
In total, the new trains can hold up to 951 passengers, with just 256 seats and 695 standing.
The older D-Stock trains had more seats but held just over 800 passengers, 20% fewer.
In the UK similar trains also run on the London Overground – which operates orbital commuter lines around the capital.
Walk-through trains are increasingly common around the world, including in Paris, New York, Toronto and Tokyo.