You’re working on a project and desperately need to concentrate. At that exact same moment a colleague decides that they need to ask you something. They interrupt. It’s urgent – for them, but not for you. Try as you might to politely signal that you’re busy, they’re not for budging. Your flow, your task and your patience have been mightily tested. How do you deal with colleagues unable or unwilling to decipher your subtle (and not so subtle) “Can’t you see I’m busy?” cues. Fanfare. Meet the ‘FlowLight’