Step this way to get your daily fix of green news, eco product launches and videos delivered by email.

We don't remember ever taking a mini-cab that looked anything like the gorgeous, but terribly uneconomical, Rolls Royce Phantom (above). Strangely though, Transport for London records show that there are eight of them currently being used as private hire vehicles in the city. This alone seems unusual, but there’s also an Aston Martin DB7, two Maseratis, a Cadillac and three Maybachs, all registered in the same way.
Mini-cabs are exempt from the £8 per day congestion charge, which has led some to claim that the owners of this fleet of 'super-cabs' may in fact be exploiting a loophole to save money. If this is the case, then expect a rapid rise in Rolls Royce mini-cabs when the congestion charge rises to £25 for heavily polluting vehicles in 2008. Unless the loophole is closed there is very little to stop drivers of large vehicles avoiding the charge, which undermines the whole scheme.
While we can't say for sure whether this is true, we can state with certainty that we've never been whisked home by a Cadillac after a night in the pub.

Step this way to get your daily fix of green news, eco product launches and videos delivered by email.