East Belfast MLA Michael Copeland told ITV News, "speaking as someone who for years looked under their car and actually still does, we're standing here on a very miserable afternoon that could have been a lot more miserable."
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Tony Davies was the first civilian to reach Pc Palmer after he was stabbed during the Westminster attack.
Defiant Londoners put on a show of solidarity for the victims of the Westminster terror attack at a vigil in their honour.
Weather set to improve with plenty of sunshine by Saturday