Readabilty...
With respect I think you missed the point, to get to Shanghai or many other long haul destinations from EDI or GLA will always involve hubbing, there is not enough volume to merit direct, and indeed may of the regional long hauls don't last very long. However the traditional LHR hub is such a nightmare that folk in the regions will have a far better passenger experience hubbing at AMS, but why should they if LHR was run efficently?