By April 1945, nine different fields (Serial B1, part 1 to 4, Serial B2, part 1 to 4, and Serial B3, part 1), comprising 900 Mk XVII/XVII(8) mines were laid off Lizard Head.
By April 1945, nine distinct areas (Serial B1, parts 1 to 4, Serial B2, parts 1 to 4, and Serial B3, part 1), encompassing 900 Mk XVII/XVII(8) mines were laid out at Lizard Head.