I was watching guy martin classic F1 show with the 1983 Williams & made me want to relook at the 2021 rules, the ideas look espically the 2019 regs where ross brawn is hoping that "they will lose only 20% of performance when following another car, compared to 50% at the moment, making it easier to race & overtake". because I wondering if they had included ground effect, because it would solved a few of the problems we have now because I know F2 had some in their cars & than brundle has mention on many occasions because if your getting some downforce from your ground effect not the wings from the car infront, you can get closer