The sightseeing helicopter route over London follows The River Thames from Putney in the West to Greenwich in the East, climbing to over 1,000ft above the city's skyline. The flight will cover Buckingham Palace, Westminster Abbey, The Tower of London, Shakespeares Globe Theatre and The Shard.
Famous sporting venues including Wembley, The Emirates and the Olympic Stadium are also visible from the route.
More top news
The 24-year-old was unarmed and the incident is not being treated as terror-related.
Some platforms have been taken out of service with disruption expected to continue until the end of the day.
The Met Office has extended its weather warnings for snow and ice to cover vast swathes of the country, including London and the South East.