I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Free parking at chichester marina, easy to walk around marina and find a safe place to take off. I took off at the boot entry to the marina Which was well out of the way of anyone and you still have good visual view of the site.
On site there are public toilets a restaurant and a Cafe making this an enjoyable place to visit.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 16/08/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.