Formula One's plan to return to racing in July is dependent on a series of behind-closed-doors races in Europe.
F1 hopes to start the season with a spectator-free Austrian Grand Prix on July 5, which would see only essential personnel attend the race to execute and broadcast it effectively. If that goes smoothly, similar events in Britain and Hungary could follow.
While its hard to get a concrete figure, ball-park figures for a behind-closed-doors race range from 1,200 to 1,500 people, highlighting the scale of the F1 operation.
But how does that number translate across the teams and circuit staff?