Sounds like a quaint corner of the garden of England until you hear, then see, the angry iridescent critters circling its centre. These are Range Rover Sport SVRs in 2018 specification and palette - and Fen End is home to a Land Rover test circuit. We’ve come in a fresh convoy for hot (and supervised) laps in the supercharged V8s, howling along the main straight to nudge 240kmh, backing off for the banked turn then launching again.