Current advice is that race meetings such as the BTCC are still going ahead, there will be a round on both weekends either side of this event. The feeling is that outdoor events are nothing like as contagious as placing thousands of people into an enclosed space
Obvious advice stands I imagine, if you feel ill, display any of the published signs, then don’t come just as you wouldn’t go anywhere else
Otherwise, at least as of today, there is no reason to believe the day will not go ahead. If Government advice changes, then all bets are off