I filter up the inside all the bloody time, usually in a cycle lane, I'll switch to the outside if the inside gets blocked, yes doors might open, especially near stations but normally straight after a vehicle has stopped oddly, vehicles don't move sideways
What I would never do is out myself on the left of a vehicle at a junction
I did run into the back of a van a few weeks ago, fortunately I was on a Boris bike, white van cut across in front of me without signalling, I misjudged the space i had to pass him on the right due him then stopping and hit firmly into the centre of the back, the Boris bike was fine but there was a loud bang, someone shouted out to ask if i was alright, i got ready for a row with the van driver but natch he drove off
what might be sensible outside London plain doesn't work in London init