The big crowds have disappeared, but all ten teams were back at work at the Barcelona-Catalunya circuit for the first of two days of testing. Pierre Gasly was driving for Aston Martin Red Bull Racing and Daniil Kvyat was on duty for Scuderia Toro Rosso. There were big mileages from both men; the Russian doing 121 laps and the Frenchman 118. Everything ran smoothly on the PU front, which meant the teams were able to get on with their own programmes, while on the Honda side we worked towards the next race in Monaco, but also looked at more long term development items. Tomorrow, we have a change of drivers: in the Red Bull is the English youngster Dan Ticktum, while Alex Albon is in the Toro Rosso.