Hey! yeah some of the lectures are recorded, like mine in the Economics modules, but not all of them are I think. It's normally down to how big the course is (e.g. the more students taking the course, the greater the demand for them to know stuff that went on in lectures). One of my Economics modules has roughly 700 people enrolled so there is great demand to record it. Other courses, which maybe aren't so large, don't get this opportunity. It should also be noted that it is not good to miss lectures in substituting the online recording for learning, because lectures are better since you get to know the knowledge of the lecturer there and then and in person, plus you can see the animations on slides etc.
And wow that's certainly a question I haven't asked before haha! Well, I have a housemate who I would consider posh but I'm not sure he went to a private school (he is kind of a millionaire though). People consider me posh because I come from the south (where everyone is considered posh pretty much haha) but I've been public schooled for my whole life.
Thing is, is that it's difficult to get a good estimate due to all of the international students that study here. In most cases, their parents are paying the tuition fees and what else not. But from my experiences, I've not come across many posh people or private-schooled students. Most are in the same boat as me that are public schooled and/or not posh. Having said that, there the odd one or two that are, but we're not talking on the same levels as Oxbridge/Durham/UCL/Exeter etc.
Plus the "posh" couple of people I know are quite nice, hardly snobby at all!
EDIT: as Tim TIC has pointed out, I was actually State educated, not public educated