The cabin of the Caterham is simplicity itself and is as easy to use as a knife and fork. After all when you’re hurtling around a track, or enjoying the twists and turns around a country lane, the last thing you want to be distracted by is a radio or satellite navigation. Two seats and a steering wheel are pretty much all you get. The dials and controls stretch across the dashboard and take some getting used to, and as for luxuries, don’t expect much, if anything. The Roadsport, Supersport, Superlight R400 and CSR are available in an SV body style, which has a wider body and longer footwell for increased interior space and luggage room. But, SV or not, don’t expect any sort of in car entertainment and as for air-con, the closest you’ll get is the cool breeze wafting into the cabin with the roof down. The ignition is hidden under the dashboard and is fiddly to access, but after a while you get used to it. The seating position is snug,  low and probably not great for six footers or those with fuller figures, and getting in and out with the roof up isn’t the most dignified of processes. As you go up the range, the seats, dashboard and gauges look more like you’ll find in a racing car, with composite materials adding an air of pitlane-cool.