It's a toss-up as to whether the dimmest people in the UK either work at HM Treasury or in the roads department of local councils.

However, as I write this, the International Monetary Fund has not yet arrived in the UK to pull the plug on our overdraft. So, I'll go with local traffic planners.

Every day I travel out of London on the A3, which means passing through the Wandsworth one-way system, a notorious bottleneck that many drivers will have experienced.

Strictly speaking, it's a Gyratory. Wandsworth High Street copes with the eastbound traffic and a new road, running in parallel to the high street, handles eastbound traffic. At peak hours it is a nightmare.

Now the logistic geniuses at Transport for London have decided that the Gyratory, so beloved of 1970s traffic planners, will be steadily wiped off the Greater London map.