Terrorism expert Dr David Lowe explains why we see officers in different types of clothing - from balaclavas and jeans to hard helmets.
Duchess of Sussex: Meghan faced very real threats, says Met chief
Accidentally Gentleman Miles do all police officers wear
Accidentally Gentleman Miles do all police officers wear
Prevent counter-terror scheme failures leave public at risk - ex
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Police - Wikipedia
Leeds: Two arrested on suspicion of terror offences - BBC News
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Police call for urgent review of stop and search protocols after
powder Pronoun unit do police officers wear bulletproof vests
