Couples in Peterborough the most fertile in England, why the city is seeing a baby boom

Which are Britain's most fertile cities?
Which are Britain's most fertile cities?
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Peterborough has the highest fertility rate in England and Wales while Cambridge has one of the lowest new figures show.

An average of 2.34 children per woman were born in Peterborough in 2014, according to the Office for National Statistics (ONS).

Other areas with high fertility rates were Harlow (2.31 children), Forest Heath (2.31) and Barking & Dagenham (2.28).

The City of London had the lowest fertility rate, with 0.96 children per woman. Seven of the top 10 areas with the lowest rates were in London, with only Brighton and Hove, Cambridge and Oxford outside the capital.

By contrast, mortality levels for 2014 were highest in Middlesbrough. The mortality ratio in the town was 137, a total of 37 points above the national level. The lowest mortality ratio was for Kensington & Chelsea (73).

The ratio is calculated by comparing the observed number of deaths in a population with the expected number of deaths. A ratio of 100 means that mortality levels are the same as the national levels.

Eight of the 10 areas with the highest mortality ratio in 2014 were in northern England. The exceptions were Blaenau Gwent in Wales and Bolsover in Derbyshire.

The City of London had a mortality ratio of 43, but due to the small size of the ONS sample this is not considered statistically reliable.

In total there were 695,233 live births and 501,424 deaths registered in England and Wales in 2014. This is a difference of 193,809: the sixth largest gap of the past 40 years.