For users who use FTX England or Earth sims Guernsey, or indeed any add-on that changes the Guernsey terrain, Please use this alternative file.
Download and overwrite the file in the Guernsey Xtreme Scenery folder
Also if you use FTX, then delete file "ADE_FTX_ENG_EGJB_elevation_adjustment.bgl" from your FTX scenery folder
