I've been to 4 events so far: Lydd - behind closed doors - invitation only. Eastbourne - tight as a drum, masks worn throughout, quite uncomfortable really. Frittenden - battle of Britain Grasstrack - relaxed attitude, masks seemed optional. Kent - masks worn when moving about, optional in grandstand. Stewards enforcing the rules.
It seems 'elite sports' have different rules to non league football, which is mainly track and trace and temperature tests only.