She said: "I snapped this on my way to work one morning. I have no idea what it means, but this was stuck to a road sign indicating the diversion away from Brick Lane (it's currently closed for East London line work but I continually see GPS idiots go up there anyway, and I laugh)."
If anyone has any idea, it would be appreciated!
Going a bit further afield now, Pete from the Londoneer spotted this in Poland.
He said: "Here's a roundel I saw one weekend while I was in Wroclaw (pronounced Vrots-waff) in Poland - cheeky or what! I think it's offering an internet service...".
Finally some sporting roundels. The strapping lads below are from the Putney Magpies, a team in the British Australian Rules Football League or BARFL.
Before TfL's solicitors go racing across to Putney to rip the shirts off these guys, I'm told by Peter O'Neill who sent them to me, that there were a number of complaints by opposing team members & referees, saying it was too hard to see the players' numbers against the roundels, so they no longer use these shirts.
Thanks to you all for sending the photos in. The full set of Roundels Not on the London Underground can be seen here. If you spot any more roundels in unusual places please email them to me and I'll put the best up on the next post I do on this.