Hall Clips -Bag of 20 - Lead Flashing Fixing Clip - Fixed in a Flash! Quick Flashing Clips Easy Flash use in The Chase to Dress Before Pointing or Sealing : Amazon.co.uk:
Architecture Design Handbook: Flashings and Copings - Counterflashing
Stepped cover flashing geometry, different for a 30 degree pitch? - Roofing, Tiling & Slating - BuildHub.org.uk