OP, only you know how you entered the inside traffic lane and what happened while you were stationary. However, based on your account I suggest:
Contravention did not occur.
I was stationary at the bus stop as can be seen in the video. However, this was simply because I was stuck in a line of traffic, in this case behind a bus, and unable to get out. I therefore claim the exemption as follows:
Unable to proceed by virtue of circumstances beyond the driver's control
Prior to the location, Waterloo Road has two running traffic lanes and I was on the inner. When coming under the bridge there is nothing to suggest to a driver that the carriageway would reduce to a single traffic lane, even less that at the point immediately prior to this narrowing there is a bus stop. I followed vehicles along the traffic lane and then was forced to stop because the vehicle ahead, a bus, had also stopped. At this time I found myself at the bus stop as the filling in a bus sandwich with another one behind. The closeness of this bus and of me to the one in front meant that my rear view was obscured to such a degree that I could not extricate myself without fear of my offside wing being hit. I therefore sat and waited until the bus ahead moved off and which exact point I moved off as can be seen in the video. Not only did I move immediately, but I went straight ahead still being unaware that the road would narrow after no more than a few yards.
The CCTV commences only when I was stationary and shows nothing other than me being stuck as explained above.
Yes I was stationary but no, a contravention did not occur for the reasons given and I should be grateful if the authority's consideration and response would focus on the why(circumstances beyond my control) and not the what which is not in dispute.