r/smartschoolboy9 is a bunch of posts complaining that the sub went to shit because of no moderation. At some point one of the mods just asked people to join r/ellapiper of Pipergate fame. Right now the sub has three back-to-back personal accounts of finding David/his alts, all at this point should be taken with a pinch of salt, they also have been getting lost in red herrings again and likely falling for bait.
r/truth_sticks_11 died because of the red herring of Stephen Wallace with people swearing that they were the same guy out of vibes.
r/ok_jo14 was the attempt by people that weren't DoncasterLocal_ and serrated_meerkat to lead an investigation but is mostly just stuff you would find in the first sub organized neatly.
Best post from r/ok_jo14 by who else but serrated_meerkat.
https://archive.is/xJNok

One redditor did this, all Lambeth photos mapped. I forgot to linked in my first archive dump and I don't have the link anymore.

Full Flatmates post.
Closest thing to a timeline we can piece so far is that he was in Doncaster from at least the 90s (had he started around then he would be in his mid 20s) till the 2000s (@littlegingerkittyy claims Hall Cross happened around 14 years ago) let's say mid 2000s, about enough time to get a school patch for his jacket from Pontefract.
The Streatham poem was issued in late 2018 or at least submitted. The Kennington comments are from 2020. Basically all his exploits can be traced to Lambeth before the move to Fullers Slade in Milton Keynes, where he likely lives right now. But is not certain and I'm likely missing many pieces.

Extremely rough and not exact map of his trajectory. Starts in King's School at Pontefract, 3 Vaughan Ave and Hall Cross Academy at Doncaster, Kennington (counted everything in Lambeth as one), 15 Black Prince Rd in London and ends in Fullers Slade at Milton Keynes.