Might be going mad here, but I swear I saw that Polysics were playing at the Brighton-Japan Festival on 19/09/2013. Now I can't find any evidence of such a thing, but I can see they are advertised to play in France on that date - http://www.lafourmi87.net/2013/09/13/polysics-myciaa/
Any ideas whats going on here? maybe somebody can at least confirm they saw the same thing so I can have some reassurance i'm not going mad. I was getting rather excited about making the Trip to Brighton and work commitments preclude me from going to the London show later on in the month.