How do I cancel a booking

Just select the line and in “Bulk actions” select the action you want (“Deny booking (and move to trash)”).
This allows to recover denied bookings from trash too.

Thanks Franky – I’m going to ahve to change all this terminology as it’s a cancellation – not a denial.

Deny in the admin backend is in the end the same (like said in the other thread: I’m using ‘cancel’ for the frontend if the user wants to cancel).
But I’ll rethink the terminology …