As Iain Dale has explained, Livingstone is:
... making every cab fit a piece of technology which is supposed to reduce exhaust emissions. Not a bad thing in theory, but the technology doesn't work. It doesn't reduce emissions, it actually increases them! Newer cabs have it fitted as standard but older cabs have to have it fitted retrospectively at a cost of £2500. The cabbies are issuing legal challenges but Livingstone won't talk to them and still maintains the technology works despite all the evidence to the contrary.
Now there is a shock. A group of people prove Livingstone wrong and want to talk to him about it and he will not give them the time of day? Who would have thought? If you think we are being harsh on London's communist Mayor, why not watch the film below for yourself and make your own mind up?