Well as per the article Keighley MP John Grogan, who requested the figures from the Commons Transport Committee.
I assume the Transport Committee didn't just make up figures but what their source was I don't know.
However, Justine Greening has also referred to the potential loss of direct air services to regional airports. The other figures that had also been posted were in percentage terms I recall. I would think it likely that these sort of forecasts would take into account projected growth at those regional airports before R3 opened. Hence the reference to 2030.
And I see Ozzy has now correctly pointed out that the figures refer to all international flights, not just long haul.
Last edited by MANFOD; 25th Jun 2018 at 08:55.
Reason: another reference