Great news for Easyjet, and a potential for them to consider experimenting with through ticketing if they are the sole user of the North terminal.
And if memory serves me right, was the North terminal not set up as a sole BA operation. IMO it’s BA that’s let down LGW and the south catchment area, by reducing their commitment. .
Maybe VS are involved because their moving North too, allowing for seamless transfers from EZ flights onto their long-haul routes.