The government's Help to Buy scheme is providing more support to buyers in the north-west and the east than to those in London and the south-east, according to the Treasury.
Only 5% of total mortgage completions using the scheme were for homes in London, with 14% in the south-east.
The finding follows claims that the scheme was supporting a housing "bubble" in the capital and south-east.
More top news
A man has had hit foot amputated after falling into an escalator in Shanghai - just a week after a woman died in a similar incident.
Industry groups and political rivals warn the planned regulation will raise energy prices and threaten jobs.
The actress said she was 'devastated' to hear the tragic news of her idol's death and described her as a 'remarkable woman'.