Hi there,
Did you get your keys back?
I did see them in the Ladies loo and wondered whether I should pick them up and hand them to the police. I asked around and they didn't belong to anyone I asked so in the end I put them back on the windowsill in the ladies hoping you might retrace your steps.
Sorry but I didn't really know what else to do.

Hi,

I was in this playground today, and a woman picked them up, and was asking everyone if they were theirs... We suggested leaving them in a safe place such as the local pub behind the bar. I'm really sorry, I didn't see/hear what she did eventually do with them, BUT it might be worth checking the playground in case she left them there and/or asking the pub.

Really sorry not to be more help-hope you track them down or that the lady who found them reads this!

I left my black VW car keys in the Ladies toilets in the playground at Clapham Common this morning. If you happen to have picked them up, please let me know!