Some of the details I've been able to extract are:
The Ghana Party In The Park is on Sat 13th July, and will run from midday to 9pm.
The Mauritius Open Air Festival is on Sun 14th July, and will run from midday to 8pm.
From 12 noon to 4 pm, there will be warm-up performances, corporate messages and giveaways. The main live acts and performances occur from 4 pm to 7.45 pm.
Bars will stop serving 30 minutes before the end of the event.
Traffic Management (click link for their document)
Wed 10 - Fri 12 July vehicles arriving to set up event
Sat 13 & Sun 14 July
Road closures:
- Avondale Avenue
- Brookside
- Capel Road
- Cedar Avenue
- Church Hill Branch Roads (2x)
- East Walk
- Littlegrove
- Rushdene Avenue
- Stuart Road
- West Walk
- Woodfield Drive
Parking and waiting prohibited:
- Church Hill Road, from the junction with Parkside Gardens to the junction with Littlegrove
- Parkside Gardens, from the junction with Church Hill Road to the junction with Brookside S
Mon 15 July vehicles dismantling and removing event
They recommend visitors walk from Southgate tube station, Oakleigh Park train station, or get the 184 / 382 bus or free shuttle from Arnos Grove.
Visitors who have bought one of the 100 car park tickets in advance will not be allowed to turn right from Church Hill Road into the grass car park. They will have to turn round at the Village and come back to turn left into the car park.
They say "Since the event has a wide appeal, we expect most of the visitors will be travelling into the area. Based on previous years the Travel Mode Share is:
- Public Transport: 40%
- Taxi: 15%
- Shuttle Service: 20%
- Personal Vehicles: 20%
- On foot: 5%"
So if they do sell 5,000 tickets for each event, and 20% arrive in personal vehicles... That's potentially 1,000 people in maybe 400 vehicles?
They say "All road closures will be manned by at least 1 traffic operative at all times the road closure is in place. Vehicles requiring access to their relevant residences will be advised to carry a copy of the Borough of Barnet Council Event Notification letter. Residents will also be advised to use a key word or provide proof of address when entering their road by car."
The organisers have agreed to discuss their plans with residents at a public meeting which I am organising at St Mary's Church. More details to follow.