Hey there,
I just performed a test comment as a guest on one of your blog post again and run the cron URL already.
Can you check again on your inbox and spam folder again and see whether you receive the notification or not and see whether is it only your email geoff@ashtutors.co.uk faces this issue only?
For your information, I am able to log in to your
https://www.ashtutors.co.uk/cpanel but when I clicked the 'Cron Job', it will keep log me out as shown in the screenshot.
Can you try to log in and select 'Cron Job' to see the configuration settings of it as shown in the screenshot too?
If you can, can you make a screenshot for us on the configuration settings of it?