Chris Mann, MD of The London Helicopter said "Were thrilled to be launching the first London based helicopter sightseeing service from Londons only Heliport. Joining the likes of New York, Las Vegas and Cape Town makes us enormously proud."
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Muslim leaders condemned the "heinous and appalling" Westminster terror attack.
Travis Frain is recovering in hospital and has posted a photo to Twitter of Prince Charles by his bedside.
Acting Commissioner Craig Mackey led new policemen and women in paying their respects at a passing-out parade in Hendon, north-west London.