Russians in particular, in the aftermath of the Ukraine crisis, have reportedly been trying to stash their cash in London's most expensive properties, but this is not something chief executive of exclusive property finder London Central Portfolio, Naomi Heaton has seen much of.  Read MoreLondon house prices face boost from Ukraine turmoil  "From our point it hasn't been much of a story, there has not been a notable impact on the market as a result of the sanctions imposed in April and at the moment I would be really surprised if new sanctions would have any impact," she said.  "There were only 51 properties over $10 million sold last year, so we were never talking about a big quantity, and Russians only represent about 2 percent of buyers," she said.  However, while Russians may not be buying that many prime London properties – they are certainly renting them.  There are more Russians, particularly students, newly renting property in "iconic postcodes" in central London than any other nationality, Heaton said.  Read MoreLondon luxury housing market 'cooling', estate agents warn  "Russia represents the highest proportion of students at 13 percent of our tenancy start-ups this year. So we are seeing Russians, but interestingly we are seeing them at the other end of the process," said Heaton..  "We have more Russian students than any other nationality, which is a very interesting statistic – but we are not seeing the buying end," she added.  Global estate agent Knight Frank has found that international buyers are now retreating from the ultra-luxury London property market. Foreign buyers accounted for under half (47 percent) of the super-prime market so far this year, down from 64 percent last year and 73 percent in 2012.
Foreign buyers have been blamed for rising London house prices, but estate agents say the rental market has seen a rise in Russian interest.