It's Salmon! It's the Hammersmith & City Line

Opening in 1864, the H&C's history is inextricably intertwined with 3 other Underground lines - the Metropolitan, the District, and the Circle

Despite being the second oldest line on the network, the H&C has no unique stations - they're all shared with at least 1 other line

The Hammersmith & City Railway, as it was originally called, was not intended as a main line. It was designed as feeder to the Metropolitan Railway (today's Metropolitan line)

It ran from Paddington to Hammersmith, through Notting Hill and Shepherd’s Bush. There was also a branch from Latimer Road to Kensington Olympia, then known as Addison Road

The Metropolitan Railway ran the trains to Hammersmith and the Great Western Railway ran the trains to Kensington. In 1867 the line became jointly owned by the 2 companies

Because the H&C service was fully operated by Metropolitan stock, it didn't have its own colour on the tube map

In 1990, the H&C was finally given it's own colour on the tube map - a distinctive salmon pink!

When the Circle loop was broken, its services spiralled off to run to Hammersmith. The result was that the H&C now had no stations it could call uniquely its own

S7 trains are 25% longer than the ones they replaced, and have no doors between cars. This involved redesigning the signalling at the key site of Edgware Road to cope with trains of both lengths