People don’t always look at the broader problems or may feel helpless to tackle them, and so they focus on protecting their locale.

Frustration exploded into fury in Thetford, Norfolk, following weeks of protests at a nearby former military barracks which has already been earmarked to take 1,250 male migrants.

One officer was hit by a rock and another was bitten as the angry crowd gathered in the Norfolk town of Thetford.