I thought that I read somewhere that Rover engines are not E10 fuel compliant. Not an issue of course for as long as more expensive E5 is available or if you use an additive that is also cat compliant (if it has a cat that is)

Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900