Spooked!

This logo can be found all over the UK just above eye level.

It's a brand of burgler alarms.

But I like to think of them as the spying world's equivalent of English Heritage's blue plaque. They mark the location of a particularly devious piece of Cold War skulduggery - preferably involving a CIA agent with a scar, a Glock 23, and a hard drinking habit, and a KGB femme fatale with a smoky Mitteleuropean accent, a ricin-tipped pair of stiletto heels, and an entourage of neanderthal heavies.