The charts that show London's economic recovery could pave the way for the next financial crisis

Since the financial crisis, London's economy grew by 28.9 per cent - almost twice the rate of Leeds or Cardiff

Londoners report lower than average happiness (Rex)

The ONS has released some data showing which UK cities are contributing the most to the national economy.

Since the financial crisis, London's economy grew by 28.9 per cent - almost twice the rate of Leeds or Cardiff.

More than 80 per cent of London's economic growth came from real estate - but finance is still a much bigger industry.

Manchester, where the economy has grown half as fast since 2009, relies far more heavily on manufacturing, transport and hospitality than finance or real estate.

If we look at growth over the period 2013-14, we can see that Glasgow's economy was the fastest growing in the UK.

More than a fifth of this growth came from the finance industry. Between 2009-14, 40 per cent of Glasgow's economic growth came from real estate.

This tells us that the local economies that are growing fastest rely heavily on real estate and finance - or debt.

ONS data tells us that Londoners are still far more unhappy than average despite strong economy growth. So it's not making people happy.

Too much reliance on debt is once reason why the British Chambers of Commerce has downgraded UK economic growth for the year from 2.6 per cent to 2.4 per cent.

John Longworth, the BCC's director general, said that too much borrowing can spell disaster when interest rates rise and people can no longer afford to pay their debts.

The average household is forecast to debt worth 163 per cent of disposable income by 2021. The last time this ratio was so high was before the financial crisis in 2008.