File:Sillitoe Tartan blue and white.svg - Wikipedia

Percy Sillitoe

List of law enforcement agencies in the United Kingdom, Crown Dependencies and British Overseas Territories - Wikiwand

Tartan - Wikiwand

File:Sillitoe-green.svg - Wikipedia

Promotional Steal Abstract rectangles white and blue background Vector Image, white and blue

Check (pattern) - Wikipedia

Chicago Police Department - Wikipedia

Sillitoe's Tartan: The Scottish Origins of a Global Emergency Services Pattern - 99% Invisible

Sillitoe tartan - Wikiwand

Tartan - Wikipedia