Ken Livingstone's flawed system...

Fascinating to hear of the sharp rise in mini cab operating licences at Transport for London - particularly from two-seater sports cars.

It seems that for £109 a year, you can register your car as a mini cab..

So when you next call a cab to drop you to the station or take you home after an evening out, don't be surprised when a Ferrari or an Aston Martin pulls up. Or maybe there's some other reason.

One of the fringe benefits of this registration is apparently an exemption from the Congestion Charge...