London has the five healthiest areas of England, new research has revealed.
The Royal Mail commissioned the Centre for Economic and Business Research to conduct a study to mark the 40th anniversary of the allocation of postcodes to every town in the country.
London also has the highest outstanding mortgages.
The City of London EC4A postcode was found to have the highest average outstanding mortgage at £112, 000 per capita.
This was followed by the south west London postcode areas of SW1H and SW1A.