Pre-season Formula 1 testing can be difficult enough to get a clear understanding from even when things go smoothly, but in 2018 the first test gave us even fewer indications than usual thanks to the weather.
Freezing temperatures and rain - and even heavy snow one morning - made the first three and a half days effectively a write-off for the teams, and led to a very busy final afternoon as everybody played catch-up on mileage.
There's certainly not much data to go on - for the teams or for those of us analysing what we saw in Spain - but by being on the ground at Barcelona's Catalunya circuit, Autosport's team was still able to pick out several interesting details that emerged during the opening test.