Undertaking / filtering on left?

Wait in primary in queue at traffic at lights --> get massive draft from vehicles in front of you as you cruise past all the twats who've scooted up the inside.
This.

This.... then look at them quizzically as they do the old one footed scoot up the inside again at the next set of lights and repeat until you get pace on them and leave them a couple of junctions behind you.
And this.