Colors = id:canvas value:rgb(0.937,0.937,0.937) id:linemark value:gray(0.8) id:linemark2 value:gray(0.9) BackgroundColors = canvas:canvas PlotData = mark:(line,linemark) from:start till:2 color:blue shift:(20,-5) text:Lee Wallard (Laps 1–2) from:2 till:4 color:black shift:(20,-5) text:Jack McGrath (Laps 3–4) from:4 till:6 color:blue shift:(20,-5) text:Lee Wallard (Laps 5–6) from:6 till:15 color:black shift:(20,-5) text:Jack McGrath (Laps 7–15) from:15 till:26 color:blue shift:(20,-5) text:Lee Wallard (Laps 16–26) from:26 till:27 color:purple shift:(20,-5) text:Cecil Green (Lap 27) from:27 till:51 color:blue shift:(20,-5) text:Lee Wallard (Laps 28–51) from:51 till:76 color:green shift:(20,-5) text:Jimmy Davies (Laps 52–76) from:76 till:80 color:purple shift:(20,