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English: Those who sponsored a sleeper as part of the Mail Rail postal museum initiative got to ride on the new visitor attraction and then explore the tunnels and Mount Pleasant station beneath the streets of Farringdon, in order that we could see the commemorative plaque on "our" sleeper. This was a Sub Brit wet dream - they've pretty much left everything alone, just as it was when the last through trains ran in 2003. It even smells of ozone, although today that is generated by the blizzard of large projectors over the platforms telling the story of the Post Office Underground Railway. Once the ride opens to public on September the 4th, this type of activity will no longer be possible. A once-in-a-lifetime opportunity to explore an iconic part of subterranean London!