This event has finished Took place on: Saturday, 22nd Oct 2016
Not sure why, but there's an air traffic warning that around 4,000 helium balloons are to be released over Brentford.
The notice cites a location that happens to be Brentford FC football ground, although that is usually just an estimate, and they do have a football match later in the afternoon.
Coincidence, or maybe some sort of unrelated PR stunt.
Whatever the reason is, environmentalists will hate it.
Cost: Free of Charge
Contact and Booking Details
No need to book tickets - just turn up on the day.
https://www.ianvisits.co.uk/calendar/2016/10/22/thousands-of-balloons-released-over-brentford-116122 Griffin Park, Braemar Road, Brentford, London, TW8 0NT DD/MM/YYYY