The Royal Automobile Club International Grand Prix was a motor race held on 2 October 1948, at Silverstone Airfield, Northamptonshire, UK. It is commonly cited as the first British Grand Prix of the modern era.
Held two years before the inauguration of the FIA World Championship of Drivers, the 65-lap race was run under the new Formula One regulations which effectively replaced the pre-war Grand Prix motor racing standards. Winner was the Italian Luigi Villoresi, in a Maserati 4CLT/48. A 13-lap 500 cc race, preceding the Grand Prix, was won by Spike Rhiando in a Cooper. Stirling Moss failed to finish after mechanical problems.
The race meeting marked the opening of the Silverstone Circuit, although at the time the site was only on a one-year loan to the RAC from the Air Ministry, having been a bomber station during World War II.
Background
The Royal Automobile Club had previously run two International Grands Prix at the banked Brooklands circuit, in Surrey, in 1926 and 1927, and the Donington Park circuit had hosted four non-ranking Grands Prix between 1935 and 1939, but with the hiatus caused by the Second World War motorsport in Britain had lost ground to continental countries. Its two major race circuits were unusable, with Donington still littered with detritus from its wartime role as a supply depot, while the Brooklands circuit had been a major centre for aircraft development during the war and much of the track had been built over. With the abundance of redundant airfields in the years following the end of hostilities, however, there were plenty of potential venues for new race circuits. One such was at RAF Silverstone, a former bomber station.
The circuit
The Royal Automobile Club took a one-year lease on the Silverstone airfield site in early 1948 and set about creating a race track. The airfield conformed to the standard model for WWII RAF sites: three long, wide runways formed a triangle, their ends joined by a narrow perimeter roadway. In this inaugural year the RAC decided to lay out a relatively long circuit, using the full lengths of the two longest runways, as well as large portions of the perimeter road.
The competitors started on the western perimeter road and headed north towards a right-hand turn, the high-speed Woodcote Corner. From there the track used the northern edge of the perimeter to a sharp right turn onto the main runway at Copse Corner. Then came the main runway, known for the race as Segrave Straight, with the track continuing to the point at which the two largest runways intersected. Here, in an attempt to better emulate a true road circuit, the course designers narrowed the track with straw bales, which funnelled the cars into a 130° left hairpin bend onto the second runway. At the end of the second runway the cars rejoined the perimeter road, just before the old Becketts Corner, before continuing on the long straight road in front of the main aircraft hangar complex, known appropriately as Hangar Straight.
At the end of the straight at what is now Stowe Corner, competitors rejoined the main runway (this southern portion now named the Seaman Straight), and headed back towards the central hairpin complex. Once again, at the intersection of the two runways the track was narrowed, before a left-hand hairpin onto the second runway, heading back out to the perimeter road. The perimeter road was rejoined at Club Corner. From this point the track once again headed north towards the finish line, passing through the flat-out Abbey Curve en route. Total track length was approximately 3.7 miles (5.9 km), substantially longer than the 2.9 miles (4.7 km) of Silverstone's classic layout, and longer even than the current 3.2-mile (5.1 km) circuit design. This was the only Grand Prix event ever held on this track layout, as from 1949 onward Silverstone circuits used only the perimeter roads. To commemorate the opening of this new circuit, all drivers completing either the Grand Prix or 500 cc race received the RAC Silverstone Plaque. Despite the interim and improvised nature of the Silverstone site, the event attracted in excess of 100,000 spectators.