That time I tried to review the entire history of the UK charts

Some time ago I started to collect and extend all of my writing about the UK pop charts. Doing this all on one long page felt like a viable idea, as it was one single place to find everything, until I ended up going into a lot of detail for the 1970s and this sort of thing started to happen when I opened it:

Besides which, some of the least good writing is at the start, and the worst writing is in an overview of the early 1960s which is both shallow and hard to follow, so there's a point of personal pride that would like to just direct people at the stuff starting in 1967 where it gets really good.

Here, therefore, is some attempt at organising it all.

1. Terms of Reference - the essential reading before you read. What this is and how I went about it.
2. 1952-1962 - serviceable. Occasionally funny. Start here if you need things to be in chronological order.
3. 1963-1966 - most in need of rewriting. Gets good toward the end of 1966 but it's not like I can split things in the middle of the year.
4. 1967-1971 - the psychedelic era and the confused world of the early 1970s. Start here if you just want the bits with good writing.
5. 1972-1975 - rock conquers all, until it doesn't. The rise of disco and a journey of introspection.