I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Parking at Strykers Bowling Alley is free for customers or pay and display but across in the Castle Grounds Parking - near the skate park is free on a Sunday
Castle Grounds Parking - https://w3w.co/spun.piles.wounds
If there has been a fair bit of rain the ground can be quite waterlogged and boggy in parts. Not many people around but you do get the odd dog walker or people on their way to the bird reserve on the other side of the A5 from this late but they generally give the side of the late a wide birth.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 22/11/2020. It remains the responsibility of any pilot to check for any changes before flying at the same location.