Coming to a canal near you soon...
By Aled Herbert
Published: 8 August 2002 11:15 GMT
Asda has taken the wraps off a range of high-tech shopping trolleys which it hopes will stop customers making off with them.
The supermarket's new techno trolley cost £2.5m to develop. Stores will be fitted with underground cables that create an invisible perimeter. When a techno-trolley passes through the barrier it receives a signal to stop.
The break can then only be released by an authorised Asda porter with a special handset.
Supermarkets can face prosecution for allowing trolleys to be abandoned.
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