It’s early January, more than a mile out to sea, and we’re looking for a body in the water. I’m on patrol with the crew of the Shoreham lifeboat, Enid Collett, a Tamar-class vessel, the RNLI’s largest all-weather boat. With its battery of screens and hydraulic-cushioned seats, the cabin is closer to the cockpit of an F-16 fighter jet than any boat I’ve been in, and it’s capable of travelling 250 nautical miles without refuelling, and hitting 25 knots.