Just watched the raw footage again, and the registration is FE51 XJA. Good call guys.
Regarding the additional 'life saver' observations, I agree that you can't do enough of these. From looking at the video though only 4 seconds pass between my observation and the lorry passing me. In terms of prior observations, I'd just pulled right onto that road a few seconds before from a junction and you can clearly see the lorry but he is a long distance back at this point. My bad that I didn't clock how quickly he was going.
This is very close to the start of my commute and I clipped the video to try and maintain some anonymity. Most users here seem like a great bunch of people, but you never know who you'll meet online. This blazed character for instance, so blinded by his precoinscieved opinion of cyclists that he spouts unreasoned opinions on this forum. I'd prefer people with this skewed mindset to know as little about me as possible
Thanks again for your opinions, it's helpful to hear what other cyclists think.