These are from my photo archives and were taken way back in 2011 when a street-art competition was taking place in the motorway underpasses between Hulme and central Manchester.
I wish I could paint that well on a piece of paper, never mind on a tiled wall with a spray can. Major respect to the artists. If any one knows who any of them are, please let me know.
Obviously it stands to sense you should try to avoid taking photo’s with a nice camera in a secluded area (like a tunnel!). If you do though, take someone with you to act as look out.