Tests are held at the INTO centre on the University of East Anglia campus in the city of Norwich.
The address is: INTO University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ
See also this UEA campus map.
How to get to INTO UEA
Trains go to Norwich from London (Liverpool Street station) and Peterborough.
Buses 25 and 26 go to the University from the railway station, from Castle Meadow and St Stephens Street near the bus station.
You can park in UEA's main car park on University Drive, near the INTO building. On Saturdays it costs £1 for the whole day.
On entering the car park, collect a token. Before leaving, insert the token and the money in a payment machine. On leaving, insert the (already paid-for) token in a machine at the exit. For more information see this page.