In all honesty it's not exactly rocket science, if someone's overtaken you the last thing you do is barge in front & force someone to do it again. If the ASL looks to be fairly full put your self in the middle of the lane between some cars, it has the same effect but means you're not creating a large pool of cyclists which are holding the traffic up as you sort them selves out.
Contrary to what User3143 said overtaking another vehicle does not increase your general awareness. What he seem to have forgotten is we're constantly filtering out the excess information we can't deal with, if you increase attention in one area you, by consequence, reduce it in another. This comes about because time is finite & decisions have to be made by certain points in time. In the case of overtaking someone instead of knowing there's a cue of traffic overtaking you, which can be estimated with a half second glance over your shoulder, you need to work out where the gaps are in that traffic, this takes far longer & requires more checks so your awareness of what's going on ahead is reduced.
. Sometimes I avoid fellow Cyclist/people on bikes just to avoid this situation but sometimes you just can't.
I get narked at 15! Swore today at one set that changed before I got there due to being held up at the prior set only to then have those that held me up trundle past and RLJ. 
