CAT111
Re runway performance.
A 787-9 requires a 3000m metres certified runway at MTOW at sea level. As BHX has a height of 325ft above sea level you can add a tiny bit more to that.
Therefore to reach the furthest destinations BHX doesn't have a long enough runway at present ,well short of that at 2599M, quarter of a mile short.
BHX runway will be 3004M when extended.
Nigel