Russia imported food and produce worth almost £10bn to Russia last year, although the total for Britain is much smaller.
However, UK farmers fear that prices will fall following Russia's decision to ban imports of EU fruit, vegetables, meat and dairy products for 12 months because of a likely glut from European farms.
ITV News correspondent Emily Morgan reports.
More top news
Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.