I think I even took a picture of one of those when I was in London last Fall: https://twitter.com/marshray/status/321038712735690754 https://twitter.com/marshra

I think I even took a picture of one of those when I was in London last Fall: https://twitter.com/marshray/status/321038712735690754 https://twitter.com/marshray/status/321038712735690754 EDIT: That may not have been my own picture in that tweet. But still ISTR having snapped a similar one.