London's position as an international destination for wealthy property hunters and workers from far and wide is well known.
But what effect is that having on the make up of the capital's population? Some numbers from the Office for National Statistics on Wednesday throw some light on that.
They suggest Londoners themselves may be moving out as the cost of living in the capital rises. So while London's population is rising overall thanks to net international migration, it loses more "internal migrants" – people moving between different local authorities in the UK – than any other region in England and Wales.
The latest internal migration report from the ONS says: "Net migration had the biggest impact in the London region with an estimated 52,000 more migrants leaving the region than arriving ... In the year ending June 2012, the net outflow for the London region was approximately 10,000 higher than in the previous year."
Most of the moves were to the regions neighbouring London, perhaps suggesting people move out to more affordable homes but remain close enough to commute to the same jobs.
The ONS says: "For the year ending June 2012 a total of 59% of all internal moves out of local authorities in London were to elsewhere in the London region, while the other 41% of internal migrants moved to other regions in England and to Wales. Moves out of London in mid-2012 were mostly to the neighbouring regions of the south-east and the east of England. The south-east region was the destination for around 40% of the moves out of London and within this figure approximately six out of 10 of these movers were aged between 16 and 44."
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