All air and sea ports have been put on alert for missing 14-year-old girl and 35-year-old John Bush.
Police say sightings suggest they are heading south from Yorkshire and that any move to leave the country would be "very foolish".
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Experts have warned that rehoming dogs from overseas is not without risks.
A diverse range of stories lead the nation’s papers on Tuesday.
Officials have welcomed a report showing more than 80% of cases have been mild.