It is a baking-hot blue-sky day off the coast of Dorset in southwest England when Sunseeker shows off its new Superhawk 55. These are the British company's home waters, at a latitude the boat will soon leave and probably never see again.
There must be wizardry at work here: the chalk cliffs of Old Harry Rocks, more often than not whipped by wind, have fallen under a spell of glassy calm. The bay is almost deserted. We can take turns to push the Sunseeker up to near full speed, 37.8 knots, and crank it over one way, then back again so the wake pays out like handwriting across the surface of the sea. These are the conditions
