Overnight conditions have seen snow fall in the West with flights cancelled at Bristol Airport.
It also closes the British Council in Russia - amid tensions over the nerve agent attack on an ex-spy.
The riot caused £850,000 worth of damage and led to 120 prisoners having to be re-housed.
Russia is behind the attempted murder of an ex-spy and his daughter in Salisbury, the PM believes.
Steve Cooper was in the the Mill pub in Salisbury where traces of a nerve agent have been found.
Team news as Bath and Exeter Chiefs meet in Sunday's Anglo-Welsh Cup final at Kingsholm (15:00 GMT).
Former Southend boss Phil Brown guides Swindon Town to a win at Cambridge United in his first game as manager.
Wiltshire Gazette and Herald
About these results
Richard Green’s Vintage Chart Show
10 amazing facts about coral reefs
Sign up for our newsletter