The Home Office has launched an eight-week consultation to see if there should be a licensing system to control the use, ownership and supply of crossbows.
Star Wars fanatic Jaswant Singh Chail, 21, climbed into the castle grounds with the weapon and later declared I m here to kill the Queen on Christmas Day 2021.
CCTV images released by police show the moment Jaswant Singh Chail was arrested, him in Windsor earlier that day and on a reconnaissance at Windsor Castle two days before.