Up to 500 Salisbury pub-goers and diners have been told to wash possessions as a precaution after nerve agent traces were found.
Trace amounts of the substance used to poison ex-Russian spy Sergei Skripal and his daughter were found at the Mill pub and Zizzi restaurant.
Prof Dame Sally Davies, the chief medical officer for England, said the risk of harm was “low”.
The advice applies to anyone in either venue after 13:30 on Sunday.
People who were at either venue before closure on Monday are advised to do the following:
- Clothes should be washed, ideally in a washing machine
- Clothes which cannot be washed, for example if they need dry cleaning, should be double bagged in plastic until further notice
- Mobile phones, handbags and other electronic items should be wiped with baby wipes, which should be bagged in plastic and put in the bin
- Other items such as jewellery and glasses should be washed with warm water and detergent.