Hi Cynthia,
I can't offer you specific odds on the availability, but I do encourage you to "go for it!" Guests change their reservations frequently, so you never know when there might be a new opening. I'd continue to do a daily check through the online dining reservation by clicking
here. I just did that with a reservation we were trying to get at a specific restaurant, and one day out of the blue there was an opening! If that doesn't work, I'd just stop by the Rose and Crown to see if they have an opening and offer to be flexible such as eating at an off time like 3:00 pm; while there aren't any guarantees, surprises can happen!
By the way, the fish and chips are must haves for my children on every trip!
Thank you for the question; please let us know if we can help again. Enjoy trying your new dining experiences, too!