The point in Wong vs Beaumount was that was it neccessary, OR was it a consequence from the use of the land, ie. common intent. Here, I'd say it was a consequence from the use of the land, and that it was a common intention. I would never think this as neccessity; its not neccessary for the actual use, not enjoyment, of the land.
S62 LPA is where general words imply the conveyene. Its pretty much where the right in gross is turned into property rights. Theres a few steps to apply too.