Four masked men armed with sledgehammers forced their way into Ram Jewellers, smashing glass display cabinets and grabbing gold bangles and rings.

Having ensured the safety of his staff and customers, the owner activated the security Smoke Screen system stripping the attackers of their biggest weapon 'speed' and escalating their biggest enemy 'time'.

This instantly stopped the raid and forced the attackers out with only a small handful of goods. Loss minimised and nobody harmed.

(footage ©BBC)