Yes, it’s the … invisible placards. The Evening Standard reports today that Jenny Jones and Darren Johnson turned up to Liberal Democrat HQ in Cowley Street today brandishing placards.

One small problem: they didn’t exactly.

They turned up, walked in, handed over a letter, walked out again, unfurled one small little sign (not even on a stick), smiled for their photographer and left. Perhaps the massed army of placards were new eco-friendly virtual placards? Now there’s a thought … the placard with the zero carbon footprint.