You know how we like roundabouts in the UK? I thought we were world-class roundabout proponents. 

Take, for example, multi-mini ‘magic’ roundabouts. In the most famous, in Swindon, five mini-roundabouts create one large one that is officially signposted ‘The Magic Roundabout’. There’s a technically more challenging, six-roundabout affair in Hemel Hempstead, but it’s lesser known, I suspect, because it’s merely called ‘The Plough Roundabout’. But both are little short of works of genius. 

I use the Hemel Hempstead one quite often, and short of a hugely extravagant system of flyovers that would occupy the entirety of south Hertfordshire, I can’t think of a system that would deal with so much traffic, from so many routes, with such deftness. 

Sure, there’s a bit of a skill to it – a touch of planning required – but all you really need to remember is that each one is a roundabout and the same rules apply to each one.