An international search to find the source of a Salmonella outbreak that has so far been linked to three deaths is under way.
Public Health England says all 156 cases it is investigating are linked - and are likely to have come from a single source.
ITV News correspondent Rupert Evelyn reports:
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Another cold, frosty and foggy night for many. Northern and western areas will see thickening cloud, patchy rain and milder temperatures.
Temperatures have already plunged to -12C in some parts of the UK this winter - but Thursday could be the coldest day yet.