Diverse Watford one of growing number of ‘rainbow’ towns in England and Wales

Amy Munn, 58, an accountant turned artist, has lived in the town for 17 years. Photograph: David Levene/The Guardian

Watford is one of a number of growing “rainbow” towns and cities in England and Wales, places where ethnic diversity is on the rise and segregation is on the wane.

Using the latest census data, a team of international geographers formulated a “diversity index” that ranks places by the spread of different ethnic groups represented.