More than 500 cases and two deaths related to UK-wide clusters of salmonella have so far been reported, with experts warning this is likely the 'tip of the iceberg'.

The number of people infected in the ongoing salmonella outbreaks may be more than four times greater than official figures suggest, an expert has warned.

More than 500 cases and two deaths related to UK-wide clusters of salmonella have so far been reported, with experts warning this is likely the 'tip of the iceberg'.