I was working on the ramp at BRU when this little caper took place. The dispatchers were told over their radio that a robbery had occurred, and for the next half hour the police and security were all over the place. My aircraft left and I went to the security gate to leave, but was told I could not as the airport had been locked down. So my options were either a) There was a team of armed theives somewhere on the field or b) They had already left and the police were closing the stable door. Neither option was appealing and despite remonstrations to G4S I had an interminable and hungry wait airside in sub zero temperatures until the penny dropped and they let us off the apron..