Port Wakefield Circuit was a motor racing circuit located approximately 1 km east of the town of Port Wakefield in South Australia.
 It was the first purpose built motor racing facility built in Australia after World War II, and only the second in Australian history.
 The circuit was created out of necessity in 1953 when two years prior the South Australian state government banned motor racing on public roads, a ban that would stay in place until 1985 when it was rescinded to create the Adelaide Street Circuit for use in the Australian Grand Prix which had become a round of the Formula One World Championship.
The 2nd Lombank Trophy was a motor race, run to Formula One rules, held on 26 March 1961 at Snetterton Motor Racing Circuit, England.
 The race was run over 37 laps of the circuit, and was won by Australian driver Jack Brabham in a Cooper T53.
The 2nd Silver City Trophy was a motor race, run to Formula One rules, held on 3 June 1961 at Brands Hatch Circuit.
 The race was run over 76 laps of the circuit, and was won by British driver Stirling Moss in a Lotus 18/21.
Brands Hatch is a motor racing circuit in West Kingsdown in Kent, England.
 First used as a grasstrack motorcycle circuit on farmland, it hosted 12 runnings of the British Grand Prix between 1964 and 1986 and currently hosts many British and International racing events.
Aintree Motor Racing Circuit is a 3-mile (4.83 km) motor racing circuit in the village of Aintree, Merseyside, England.
 The circuit is located within the famous Aintree Racecourse and used the same grandstands as horse racing.
 Built in 1954 as the "Goodwood of the North", hence the fact the two venues had so many things in common.
 The track is well surfaced and relatively flat – ranging from 15 to about 30 metres in elevation.
The Gnoo Blas Motor Racing Circuit was a motor racing circuit at Orange, New South Wales, Australia.
 The circuit was formed from rural roads and highways outside the town, around the grounds of Bloomfield Hospital and what is now known as Sir Jack Brabham Park.
 It was 6.03 km long.
 The name came from the Aboriginal name for nearby Mount Canobolas.
The 5th Silver City Trophy was a motor race, run to Formula One rules, held on 1 August 1960 at Brands Hatch Circuit.
 The race was run over 50 laps of the circuit, and was won by Australian driver Jack Brabham who led from start to finish in a Cooper T53.
Rufforth Circuit is a disused motor racing circuit built on an airfield in North Yorkshire, England.
 Rufforth circuit was built on the site of a World War II bomber base, RAF Rufforth, opened in 1942.
 The airfield remained in active service after the war, eventually closing in 1954.
 Rufforth circuit opened in 1959, and held races until 1962.
 The circuit hosted Formula 2 and Formula Junior races between 1961-1978 as well as numerous sports car events.
 The circuit was one of many of Britain's airfields to be transformed into motor racing venues.
Brooklands was a 2.75 mi motor racing circuit and aerodrome built near Weybridge in Surrey, England, United Kingdom.
 It opened in 1907 and was the world's first purpose-built motor racing circuit as well as one of Britain's first airfields, which also became Britain's largest aircraft manufacturing centre by 1918, producing military aircraft such as the Wellington and civil airliners like the VC-10.
The 2nd Daily Mirror Trophy was a motor race, run to Formula One rules, held on 14 March 1964 at Snetterton Motor Racing Circuit, England.
 The race was run over 35 laps of the circuit, and was won by British driver Innes Ireland in a BRP.

Question: Where is the motor racing circuit that the 2nd Silver City Trophy was run at located?
Answer: West Kingsdown in Kent, England