I struggled big time with this Thursday's challenge. Twice (ironically) I strolled round Trafalgar Square waiting for the pair of identical twins or the sports fan with a "2" on the back of his shirt. But no, a couple of police horses, a couple of builders and many, many loved up couples are what I found. So here is what I had to settle for:
http://www.pbase.com/image/96776379