Putin 'could lose grip on power' says activist
15 February 2012 Last updated at 08:13 GMT
A prominent Russian anti-corruption activist has told the BBC that he believes Vladimir Putin will start to lose his grip on power within 18 months.
Alexei Navalny is one of the most significant new political figures to emerge in Russia in recent years, and is one of the organisers behind the recent huge protests against election fraud.
Daniel Sandford reports.