Why have the UK riots only occurred in England?

Across England, riots have been taken place in lots of towns and cities. But people are asking why only England? Why are we not seeing civil unrest in Wales or Scotland? Even in Northern Ireland it's been on a relatively small and insignificant scale.

All parts have mixed diversity, immigration, and social problems like low income and unemployment. So what makes England different?
Why have the UK riots only occurred in England?
Why have the UK riots only occurred in England?
Why have the UK riots only occurred in England?
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