@sweetp Hi Russell, For other reasons I've had to rollback from Big Sur to Mojave of which I have the latest update, 10.14.6 (18G7016). I have installed Cookie 6.3.3.2. There is still an issue with this which may be a permissions problem. Even though I've unchecked the Apple website as a favourite, I still cannot delete the cookies.
Sorry I didn't get back to you sooner, thought there would be a notification of your reply. Cheers!

Screenshot 2021-01-08 at 13.21.07.png

There are 10 Tracking Cookies that I cannot delete. At least they are marked as Tracking Cookies, i.e., they are in red. When I click on the favourites tick box to designate them as not a favourite The box clears, the animated gear symbol appears briefly and then the favourite box is automatically re-ticked. The websites are apple.com (5), google.com (1), meteoradar.co.uk (1), mozilla.org (1), the farside.com (1) and stackoverflow.com (1). Full Disk Access is enabled. ???

@SweetP This worked for me.