Our signature Thin Blue Line UK Leather Keyring. Crafted from burgundy leather, this keyring showcases the distinctive ThinBlueLine UK Tartan and comes in both a brown and black tan. The four colours symbolise the four regions of the United Kingdom, united by a slender blue line that weaves through them all. This thin blue line has come to embody the essence of the police family, a community that is increasingly stretched and growing thinner.