I didn't know what to expect but it was pretty amazing. Beautiful in parts. You can really see how it would have been used as a 'shopping arcade'.
Worth a visit if you get the chance.
I hate all those The Future Is Rubbish people because they are wrong, but after the tour I went back upstairs and saw this.
I actually think the extensions to the East London line and the nearby Jubilee Line are a huge success design + engineering wise.
More pics on Yahoo!Photos!