Berezovsky emigrated to the UK in 2000 after falling out with President Vladimir Putin.
In fear of his life, he sought political asylum and moved to the South East of England, buying upmarket properties in Knightsbridge and Berkshire.
More top news
Streets around a Dorset cul-de-sac have been cordoned off by police investigating the shooting dead of a householder by armed intruders.
Police are investigating a fatal shooting at a house in Ringwood after intruders were reported breaking into a house
Former PM David Cameron has a family fight on his hands - over who will get to use the new luxury Shepherd's Hut at his Oxfordshire home