This week's Autosport magazine is dedicated to the many non-championship Formula 1 races that regularly took place alongside the world championship during its first quarter of a century. These events varied in terms of their prestige and nature - some were smaller, club-style sprints, while others were proper grand prix races.
But while non-championship races have long since left the schedules for F1 teams, the series did recently consider the possibility of adding extra point-less events to the calendar as a way of experimenting with weekend formats.
Back in spring 2017, when Liberty Media's tenure as F1's owner had barely begun, newly installed F1 sporting boss Ross Brawn discussed the idea of adding non-championship races. But there was a catch - as there always is - with costs.