FYI: The car parking for Humphrey Head climbing and bouldering is tidal and disappears under the sea when the tides are around 9m or bigger, particularly when the wind is blowing onshore (W/SW direction). A number of cars have been written off by it over the years.
This is not mentioned in any of the climbing guides for the area (Rockfax Northern Limestone, Lakes Bouldering Guide, Wired Sport and Slate, Eden Valley & South Lakes Limestone etc)
I've just added this info to the logbooks page for the crag.