Unexpected beauty

I would like to claim I was so "in the moment" that after a long commute I looked up as I exited the tube and saw this ... but that would be a lie ... I have often thought it is not worth taking my camera out around where I live, as it is often so bleak and derelict ... but inspired by Blipfoto I decided to today ... I have to admit I remembered seeing that the tube station was heralded as fine architecture, which I personally had never noticed ... so I actively went to see ... and this is what I found ... any guesses where?