How to correctly remove a dry verge piece
https://manthorpebuildingproducts.co.uk/contentfiles/files/MBP8249-F%20-%20GLV%20SmartVerge%20Linear%20Dry%20Verge%20System%20-%20Fitting%20Instructions%20(web).pdf.
 This link will show you how the material is fixed in place. It looks like to remove the bottom piece, you will need to remove the upper piece or pieces, first.