London mysteries: is there really a church dedicated to clowns?

Each week we solve one of London’s great mysteries (as submitted by you, the reader). This week Carl from Poplar asks: ‘I’ve heard there’s a church in London that’s dedicated to clowns. Is this true or is someone just having a laugh?’
Any clue? Post your answers below. Have a London Mystery you want solved? Comment below or tweet us at @TimeOutLondon. (Psst…if you have been reading the blog closely, you might already know the answer..!)