Mysterious markings have started to appear on people's homes - believed to be a secret code for burglars.Questions have been raised after the chalk markings started appearing on pavements and walls of homes in Crawley.Burglars have been known in the past to use such a method to indicate to each other whether a home is worth targeting.Symbols can mean anything from "nothing of value" to "a vulnerable person lives here".Earlier this week on the Maidenbower Residents Group...
