After what feels like an unusually long winter, Formula 1 pre-season testing is finally upon us. Only three days of running is permitted this season in Bahrain, so every team has already hit the track to rack up some vital shakedown mileage. But from Thursday through to Saturday, things will start to get serious. Here are some of the key things we'll be looking out for. 00:00 Time to go testing! 00:21 Progress at Mercedes? 01:06 The REAL Red Bull 01:57 Hidden details 02:49 Ferrari's power 03:45 Aston surprise? 04:24 Williams's big test 05:10 Limited running 06:15 A key 2023 change 07:02 Pecking order hints 08:21 Will the field close up? Subscribe: http://the-race.com/youtube_subscribe Website: http://the-race.com/ Twitter: @wearetherace Instagram: @wearetherace Facebook: http://facebook.com/wearetherace Podcasts: http://the-race.com/podcasts Thanks for watching - please like, share and comment, please also hit subscribe to show your support so we'll keep doing what we're doing.