The BRCA has mandated face masks, and these must now be worn at all times at the venue (except in order to eat and drink). This is non-negociable.
The wearing of face shields does not mean you don't have to wear a mask.
Please make sure you read it, it has lots of nice pictures.
To view download the BRCA's document click here
Or click this link to view it http://www.newburyrcclub.co.uk/index.php/download_file/view/241/341