Last week my wife and I went to Costco, we are exempt from wearing a mask (due to health reasons) and were told to leave the premises immediately. Apparently since 23/12/20 Costco have introduced a No mask- No entry -No exemption policy and that all members had received an email . We hadn't and would not have turned up. We were told by a member of staff that since Costo works on a membership scheme, the company can do what it wants! Apart from being treated really badly by staff, I'm wondering whether this is legal. Surely, this breaks the DDA . Any thoughts from other members? How can Costco get away with this?