LHR needs 2 or 3 extra runways if its to handle forecast growth for any significant period.
It is pointless adding only 1.
When did LHR first become constrained by capacity?
1 year ago? 5 years ago? 10 years ago?
What this government calls investment is merely rearguard action to ameliorate demand which has been constrained for years.
Investment means an airport which will operate at substantially less than 100% capacity for a significant period of time henceforth....
Personally, we should build a new one.
LHR is a national disgrace.