A sniffer dog helped detect 4,500 kilos of cocaine worth more than £450 million last year at one UK airport.
Labrador Honey was brought in to sniff out huge hauls of the class A drug at Gatwick Airport.
Her work has put the Border Force team on track for a record haul this year.
The unit seized 4,000 kilos (four tonnes) of the drug since April alone.
In 2016-17, they nabbed more than 4,500 kilos (4.5 tonnes) of cocaine with a street value of £450million, which the Sunday Mirror says is more than 28 per cent up on the previous year.
Chris Capel, Border Force assistant director, said: ‘Roving officers are looking for behaviour indicators to see who needs further examination.
‘If Honey makes someone nervous or uncomfortable, we take a proper look.’
Honey, who is also trained to sniff out crack, heroin and tobacco, helped find 15 kilos of cocaine worth £1.5million hidden in two suitcases in July. A further 1.5 kilos was found on another passenger.
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Handler Liz Martinez, 33, said: ‘When Honey gets it right, she gets a treat. When she gets it wrong, she gets told off.’
The team said drugs are often smuggled in cargo shipments, often labelled as various multimedia, such as ‘iPhones’ and ‘Canon cameras’.
Theresa May created the Border Force in 2012 when she was Home Secretary.
She aimed to combine the roles of customs, immigration and passport control.