Although there were a couple of gaps you could have dropped left in to let him past, I don't think they were long enough to do that easily or without considerable braking on your part.
As per comment on the video, I would only bother with something like that because of Roadsafe. The policeman who told you your riding was wrong does need some lessons, IMO.
That was my reasoning behind my positioning. I find that if I move over to let a car past they don't always judge my speed correctly. I have had many times in the past where I've edged over only for the car behind to wait until I'm moving back out to pass the next car or more cars than safe try to pass. This leaves me little choice but to brake hard to get squashed.
Think I should invest in a 'bent' so I can keep up 30mph easier and eliminate most of these encounters.
When speaking to the police officer he said,
Me " I was doing 26mph"
Officer "genuine speed?"
Me "indicated on Speedo and gps"
Officer "well at speeds like that you should be a professional racer"
I felt as if my point wasn't quite getting across.
As for roadsafe mikey, Hampshire don't have something like that in place. Not sure how I could push them to encourage them to set something up.
