TFL in their infinite wisdom propose too charge bikes registered before 1st july 2007 £12.50 per day to travel in to the cc zone.
As far as i can see, this has nothing to do with emission control and all about ripping off another sector of transport.
Most pre 2007 bikes already conform to the proposed lez regulations and spend a significant amount less time standing still in traffic pumping out emissions yet will be subject to the charge.
You can put forward your views for tfl to ignore at the link below.
https://consultations.tfl.gov.uk/environment/ultra-low-emission-zone