Brent has the highest proportion of severely obese Year 6 children in England, new figures show.
The borough in north west London is just 10 miles from Richmond upon Thames, which is the area with the lowest prevalence.
Sandwell, Nottingham, Barking and Dagenham, and Knowsley complete the top five local authorities with the highest levels, according to data from the National Child Measurement Programme.
In Brent 7.8% of 10 to 11 year olds were severely obese in 2017/18, compared to 1.5% in Richmond upon Thames, in south west London. Councillor Krupesh Hirani, Brent Council's Cabinet Member for Public Health, said:
Brent Central MP Dawn Butler said Labour would commit to tackling children's health issues through local government funding.
Across England, 4.2% of Year 6 children were classed severely obese last year, according to the data.