Found this on the net. Driving in the UK can't be easy...

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[Linked Image from swindonweb.com]

Until September 1972, there was only one Magic Roundabout and it was a children's television programme featuring Dougal the dog, a hippy rabbit called Dylan and the spring-loaded Zebedee.

Then a revolutionary idea (in more ways than one) which had been tested in Colchester, Essex, was also tested on Swindon's County Ground Roundabout. Until then the area had been a motorist's nightmare which routinely failed to handle the volume of traffic which converged on it from five directions.

The new roundabout (see picture) was the work of the Road Research Laboratory (RRL) and their solution was brilliantly simple. All they did was combine two roundabouts in one - the first the conventional, clockwise variety and the second, which revolved inside the first, sending traffic anti-clockwise.
[Linked Image from digitalnorseman.com]
They called it a multi-mini roundabout, but as far as Swindon folk was concerned, they now had their very own Magic Roundabout.

[Linked Image from swindonweb.com]