You are clearly sat in the right hand lane for far too long. Its people like you that create frustration regardless of what car people drive. Come on questioning peoples man hood in relation to what car they drive, whats that all about I think that raises more questions about yourself. Anyway safe driving and remember if you aren't over taking don't sit in the middle or outside lane.
Cam car had just completed overtake of slower vehicle in lane one (so not "sitting in lane two"), and moved from lane two to lane three allowing a 4 second gap between self and the vehicle being approached in lane two. RR was in lane 3 approx 300 metres behind & closing slowly when cam car moved from lane two to lane three. RR then accelerated to high speed, undertook and the rest is history. Don't be too quick to judge until you know all the facts, it’s not the mark of an intelligent person.
although we can't condone the RR's driving, OP's vehicle seems to be in lane 2 unnecessarily to begin with and moves into lane 3 very early to make his overtake.
we can't see where the RR was in relation to you when you made the move from lane 2 to lane 3 but perhaps your own driving needs to be assessed here too.
Vauxhall Mokka's seem to be exclusively driven by incompetent bell-ends.