I don't want to focus on the negative here BUT this type of manoeuvre is potentially dangerous.. Saw a rider trying to do this up towards West Ashton traffic lights from Yarnbrook, yesterday evening in the rain about 6 oclock.. talk about putting yourself into a dangerous position...Jeez! Filtering into on coming traffic, nowhere to get in, stopped in the lane of oncoming traffic... I mean c'mon.. Yes filtering is part and parcel of riding but only if it's safe surely.. I supose I'm saying, don't just do it because you can get to the front of the queue, a little more self presevation required at times... Cheers..