FdF-- could you elaborate on your concept of accommodation. As I see it, if the project costs £20bn entirely funded by the air traffic, HAL will need to collect somewhere around £0.5bn per year extra off BA. The regulator will tell HAL what they are allowed to collect and probably what sort of formulae they will use (landing charges, per passenger charges etc). BA will pass that through directly to the punters just like every other slot holder.
Aside from start ups and specific marketing initiatives there will be no scope for anything which might be anti-competitive across airlines in the aero charges.
How do you see it?