A sniffer dog found three would-be illegal immigrants trying to enter the country in a lorry – hidden among coffins.
Border Force officers used Mitzy to search the truck at the port of Dunkirk, northern France, and found the Eritrean nationals wedged between dozens of the boxes.
The lorry, which was loaded in Belgium, had been waiting to board a ferry to the UK and was bound for a funeral directors in Hounslow, West London.
All three of the stowaways were handed over to the French border police and the truck continued to its destination.
Paul Morgan, Border Force director for South East and Europe, said: "This was an unusual type of discovery, but in the past we have found people hiding in an array of freight, ranging from dog biscuits, bathtubs and now coffins.
"The incident shows exactly why we base Border Force staff in France - to stop would-be illegal immigrants before they can reach the UK.
"Our strong presence in French ports and close collaboration with the French authorities helps protect the whole of the UK from people attempting to enter the country illegally.
"As well as using sniffer dogs, officers also use heartbeat detectors, carbon dioxide probes and physical searches to find people hiding in vehicles."
