Bakerloo line 30 tonnes, and the trains would be 17% more energy-efficient with air-conditioning included, or 30% more energy-efficient without it. The intention is that these new trains would eventually operate on the Bakerloo, Central, Piccadilly and Waterloo & City lines. Off-peak services on Bakerloo line are: This forms a 20tph service (or a train every 3 minutes) between Queen's Park and Elephant & Castle. "Note: For the former Stanmore branch of the Bakerloo line, see the Jubilee line article." Between 1917 and 1982, Bakerloo line trains continued along the DC line past Harrow & Wealdstone to Watford Junction. These stations continue
Bakerloo line at Warwick Avenue station showed "Camberwell" as a destination until the 1990s. One oddity is that, almost from its opening until 1917, the Bakerloo operated with the polarity of the conductor rails reversed, the outside rail negative and the centre rail positive. This came about because the Bakerloo shared a power source with the District Railway. On the Bakerloo, the outside conductor rail tended to leak to the tunnel wall, whereas on the District Railway, the centre rail shared a similar problem. The solution was to reverse the polarity on the Bakerloo line, so that the negative rail leaked on