Estimating the Number of French Citizens in London

Are there really be 300,000 French people in London and would they really want to leave France for the UK anyway? The Mayor of London, British journalists and commentators have trotted out this "fact" a number of times over the last few years to illustrate just how popular the UK’s capital is with its neighbours across the Channel. It appears that Nicolas Sarkozy may have said it as far back as 2008. Wesley Stephenson and Charlotte McDonald brush off their best French to find out the truth. This programme was first broadcast on the BBC World Service.