Meet this group in Covent Garden the other day.
Jack the ring leader has this to say:
" the name of this circus is called the "Cirque De Rein" and for those who can't speak French it means "Circus of Nothing" which I hope is pretty self explanatory, but it all boils down to that the only thing the circus really has is the ring leader and maybe one or two performers depending if I can pester some people hehehe."
Follow his progress here. When he's famous you can say you first met him on aglimpseoflondon.