▁systems . ▁ ▁External ▁links ▁▁ ▁N PC ▁official ▁site ▁ ▁N CI ▁Agency ▁ ▁NS PA ▁ ▁NAT O ▁structure ▁ ▁Category : N AT O ▁ag encies ▁Category : B assen ge <0x0A> </s> ▁The ▁International ▁Tro phy ▁is ▁a ▁prize ▁awarded ▁ann ually ▁by ▁the ▁British ▁Racing ▁D ri vers ' ▁Club ▁to ▁the ▁winner ▁of ▁a ▁motor ▁race ▁held ▁at ▁the ▁Silver stone ▁Circ uit , ▁England . ▁For ▁many ▁years ▁it ▁formed ▁the ▁premier ▁non - ch ampion ship ▁Formula ▁One ▁event ▁in ▁Britain , ▁alongside ▁the ▁Race ▁of ▁Champions ▁at ▁Br ands ▁H atch . ▁ ▁The ▁event ▁was ▁instit uted ▁by ▁the ▁British ▁Racing ▁D ri vers ' ▁Club ▁( BR DC ) ▁in ▁August ▁ 1 9 4 9 , ▁spons ored ▁by ▁the ▁Daily ▁Express ▁newspaper , ▁for ▁cars ▁meeting ▁contemporary ▁Grand ▁Prix ▁motor ▁racing ▁reg ulations . ▁The ▁BR DC ▁drew ▁the ▁name ▁from ▁that ▁of ▁an ▁ext inct ▁event ▁formerly ▁held ▁at ▁the ▁Brook lands ▁circuit ▁in ▁the ▁early ▁ 1 9 3 0 s . ▁The ▁first ▁Silver stone ▁event ▁was ▁not ew orth y ▁as ▁it ▁was ▁the ▁first ▁to ▁use ▁the ▁former ▁air field ' s ▁per imeter ▁road ways ▁rather ▁than ▁the ▁main ▁run ways ; ▁a ▁circuit ▁layout ▁that ▁pers isted ▁for ▁over ▁forty ▁years . ▁ ▁With ▁the ▁introduction ▁of ▁the ▁new ▁World ▁Championship , ▁in ▁ 1 9 5 0 ▁the ▁International ▁Tro phy ▁became ▁a ▁non - ch ampion ship ▁race ▁held ▁to ▁Formula