There are reports that the Air Ambulance is attending to a female cyclist who has been in a collision with a vehicle on Delancey Street in Camden.
More top news
The first Blue Moon since 2012 will appear over the UK on Friday. The next won't be until 2018.
Other hate crimes against muslims and gay people have also risen.
Archie's mum was fed up with the balloon floating around her living room so suggested he let it go to see how far it could travel.