I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Boat hire available from various places in and around Sennen Cove. There are also two close(ish) points on land to fly from - a promontory near Lands End or the Sennen Cove look out point (featured in my YouTube video). Fully charged battery and minimal / onshore wind required ;o)
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 06/08/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.