The UK government has issued new advice amid a rise is E.coli cases.
They said the UK Health Security Agency (UKHSA) is working with partners to investigate a Shiga toxin-producing E. coli (STEC) outbreak.
There are 182 confirmed cases in England, 58 in Scotland, 31 in Wales, and 4 in Northern Ireland.
Based on information from 249 cases to date, 49% were admitted to hospital.
UKHSA has also confirmed that two people in England have died linked to E.coli, and both had underlying health conditions.
The E. coli outbreak is thought to be caused by some supermarket sandwiches containing salad leaves.
All the cases reported so far developed symptoms before 4 June and the number of cases being reported is now falling, offering hope the outbreak may have ended.
Amy Douglas, Incident Director at UKHSA, said: "We’re pleased that fewer cases have been reported, however we still expect to see a few more cases linked to this outbreak as further samples are referred to us for testing."