This finding is part of CACI’s report into The Wealth of the Nation. It was produced in order to mark the launch of the company’s PayCheck 99 data. Interesting insights are provided on Great Britain’s average household income by region, county, local authority and postcode area. Alongside these figures, the report also identifies wealth and poverty concentrations by ranking areas with the highest proportion of households earning over £50,000 and under £13,000.

On a broad level, CACI’s study of our nation’s wealth reveals that:

• Average household incomes in Greater London are approximately 40% higher than those in the North of England.
  
• The North/South wealth divide is starkly displayed through the comparison of Surrey and Tyne & Wear. Surrey has an average household income level that is 71% higher than Tyne & Wear.
  
• Large income disparities exist between towns. The people of Sunderland (household average of £16,100) find themselves 32% poorer than the national average, and a staggering 88% worse off than families in the West of London.
  High household incomes are, however, totally concentrated in central London. East Temple, West Temple, Blackfriars, Barbican, Embankment and Belgravia all have over 40% of their resident households earning an income
  of over £50,000.
• This wealth concentration is further marked when looking at the top 20 postal code sectors. Only one of these - Slough - is located outside of central London.
• As well as containing the poorest, Liverpool has some of the highest postcode incomes in the country with six sectors in the top 200 of households earning over £50,000.