Decay of town centres a top issue among voters especially Reform UK supporters and is fuelling resentment against Westminster

• How has your local high street changed since 2019? Check your postcode

• The struggling billionaire-owned high street that shows Reform’s road to No 10

Labour will be “washed away in a tide of discontent” at the next general election unless it tackles the decline of Britain’s high streets, a study has warned, as Guardian analysis lays bare the changing face of town centres.

Research by the University of Southampton found people feel high streets have declined more than any other part of their local area over the past decade, as household brands collapsed and shoplifting rose.