They need to introduce a rule where the in-lap is within a certain % of their fastest Q time, to deter the slow fuel saving in-lap nonsense. As the poster above says, it'll cause havoc at Monaco.
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Hamilton did 1:25.187 in Q2, while the "pole lap" was 1:26.714. I think this is stupid with this quali system, that the pole lap is not actually the fastest lap.