does it happen every journey?
my car had a hickup one day: it stalled, when i restarted it (quickly to keep traffic moving) it wasn't running right... the rev limiter was cutting in a 2.5k revs!! (instead of 7k+)
making it jump around, all jerky like..
after i pulled over and turned off and on again, all was fine!
for me, it seems my ECU/engine-management didn't reset/initialise properly during the quick cutout&restart
problem never came back.
also , 99 ron tesco fuel shouldn't be a prob.