StaticFish wrote:
The Piccadilly trains were brought in 1975?! Blimey. They look lovely
compared to the "newer" District line trains.

The Piccadilly Line trains were refurbished in the mid 1990s. Prior to that
they too were unpainted aluminium as were all trains. The only reason LU
trains are painted at all is because of the increase in the amount of
graffitti over the last 15-20 years or so.