Whatever flag they fly, the constructors cup has only been won by cars manufactured in three countries; England, Italy and France. The single French win was Matra in 1969, and their cars were prepared and entered from a woodshed in Ockham.18 teams have won as English teams. however...thats 'officially'. Merc, RB (and arguably renault) could be considered to be 'english' teams as that's where the factories are. I say 'arguably' with renault as the chassis is built here - the engine in france. so that would be 30.