I remember really going down the rabbit hole on it all at the time. We were fucked over by Johnson in that he got us to bid when we had no chance of winning. But Johnson being Johnson he was easy to manipulate and Levy got money out of him (£8m?). There was then something to do with English Heritage that we used Johnson to get over the line too with the listed buildings, but I cant remember exactly what that was (or whether he was helpful or not).
Levy's revenge on him and west ham was the 99 year running track lease. Without that, they'd have built a new stadium by now or at least got planning and would have used that to sell the club at a higher value. It also played into the Dildo Bros having to sign an agreement not to sell the club until 2023 or something along those lines. That's all off the top of my head though, there is more detail in there obviously. Despite Miss Piggy saying they wouldn't dismantle the stadium "in the Queen's name" or some such bollocks.