Back in July 2013, I actually got a 2009 Kew Gardens 50p in my change, but unfortunately spent it again later that same day, thinking it was a different 50p. I'd inadvertently put the wrong one in the zip up part of my wallet. Christ knows how I messed that one up. Think it was because I'd got several 50p's anyway, and got them all out of my pocket at the same time, in order to segregate the Kew Gardens, then must have somehow slipped the wrong one in.