Transport for London has unveiled its next generation, state-of-the-art Piccadilly Line trains ?

#FutureLondon. Transport for London has unveiled its next generation, state-of-the-art Piccadilly Line trains ?

More space, bigger doors, walk-through carriages and air-conditioning.

They use 20% less energy than the existing trains and will come into service in 2025.

Image credit: Transport for London.