Russian President Vladimir Putin must be held accountable for the death of jailed opposition leader Alexei Navalny, the UK Foreign Secretary has said.Lord David Cameron said there should be "consequences" for the Moscow leader after the country's prison agency said the 47-year-old politician and anti-corruption campaigner had died.

Russian President Vladimir Putin must be held accountable for the death of jailed opposition leader Alexei Navalny, the UK Foreign Secretary has said.Lord David Cameron said there should be "consequences" for the Moscow leader after the country's prison agency said the 47-year-old politician and anti-corruption campaigner had died.