Sorry, but simply repeating your assertion, still without any evidence, doesn't make it any more true.
T6 would clearly be necessary to support the ~700,000 ATMs that a third runway would allow. Please provide some evidential basis for your argument that traffic with two runways, even allowing for a gradual increase in average aircraft size, would necessitate additional terminal capacity over and above that of the proposed East/West toast-rack configuration.
Apology accepted. BTW, it's 740,000 movements in total with a third rwy.
LHR-3 will eventually be demolished to make way for extra "toastracks" for completed LHR-1/2 and for LHR-5. The existing occupants of LHR-3 (mostly Oneworld carriers) have to go somewhere and this will LHR-6, which will be located adjacant to LHR-5 (BA and IB and maybe EI by then(?)) thus locating all of One world near eachother.
Unfortunately, the airside of LHR-6 cannot be to the west because of the M25 and the Poyle trading estate, so it would probably go north as per the plans with a third rwy.
Sooner or later, probably later, this will be needed. Speculation at this time, and will be until December, when the government runs away from a decison in favour of a third rwy.
It was always said that there would be no LHR-4, then later, no LHR-5, but both terminals were built without rwy expansion, and after the government had declared LHR "full" (1977).
Very good point, however it's maybe worth considering the terms of what you're saying. If you want to serve the UK market via long haul, LHR has both historically and currently performed better than anywhere else. No one would seek to serve "the UK market" from MAN *only*, whereas loads serve the UK market from LHR only.
Compare LHR:MAN like for like in terms of frequency of those carriers offering service from both airports.(if someone wants to do capacity feel free)
It's skewed way beyond population density I think?
Eastbound
CX 5:1
SQ 4:1 (split with MUC)
EK 5:3
EY 2:3
QR 6:2
Westbound
UA 17:2
AA 17:3
DL 12:1
DL / VS 35:4
AC 12: 1 (MAN = Rouge and seasonal)
FI 2:1
BA well......maybe not.
Also check out the aircraft size in each case and number of seats on offer.......