I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Hylton Castle, Sunderland.
TOAL from nearby footpaths, which lead from the free car park at what3words: ///crunch.ends.wins
The adjacent field/ dene is a good place to get some flying practice in, and is also home to the ruins of St. Catherine’s Chapel.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 10/11/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.