After all the talk of new regulations and ugly noses, it was finally time to see - and hear - the new breed of turbocharged Formula 1 cars on track at Jerez this morning.
AUTOSPORT decided to head out to Dry Sac, the tight right-hander at the end of the back straight. Here, you can see the cars approaching at high speed before braking hard and coming down the (eight-speed) gearbox. They then accelerate away as the drivers head off into the faster Turn 7.
It's cool but dry as the session begins and, encouragingly, one car heads out on track straight away. It's Lewis Hamilton in the new Mercedes.