It was a productive day both in the morning and the afternoon, taking the opportunity that winter testing grants us to explore the car thoroughly, in ways that are near-impossible once the racing season starts. We tested the new prototype tyre with Lewis in the morning, which was trouble-free, and ran through set-up changes with both drivers. It was an interesting day, because it got quite gusty at various points. That was useful for us, learning how to get the best from the car as the wind picks up. Tomorrow, we will continue to explore the basic behaviour of the car, before focusing more on performance on the final day of testing.