One problem with this data is that some areas, including Greater London, are subject to a large number of commuters coming into the area, thereby artificially inflating the figures.
Selliste andmete üks probleeme seisneb asjaolus, et mõnedesse piirkondadesse (sh Suur-Londonisse) saabub suur hulk pendelrändajaid, kergitades seeläbi numbreid kunstlikult.