The collapse of a BP share-swap deal with Russian state oil company Rosneft is just one of a string of failures which show that Russia is "uninvestable", according to William Browder, once the country’s largest portfolio investor.


BP’s proposed tie-up with Rosneft fell throughafter an agreement could not be reached with Alfa Access Renova (AAR) — a consortium of local billionaires who had a pre-existing joint venture with the oil giant, TNK-BP – to break an earlier contract.