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CDG was always a fairly disorganised airport but it was very busy (76m passengers pre-Covid).  The additional terminal would have increased capacity by 35-40m passengers (about 50% capacity increase).CDG passenger numbers have grown 7 fold in the last 40 years whereas Heathrow has grown 2.5x In the hopefully soon post Covid world it may be the air travel reduces, which would have made the CDG expansion either wholly unnecessary or unnecessarily large in scale.  But the point is that until we get to that post Covid world and live in it for a few years we just do not know how popular air travel will be.But there are 2 key differences between CDG and Heathrow.  Heathrow has been operating a full capacity (80 m passengers) for some time, CDG in 2019 still had some spare capacity (about 4 million passengers worth).  Secondly, a much greater proportion of air travel from CDG looks as though it could be reached in a reasonable time frame by high speed rail than for Heathrow.Whilst it is perfectly legitimate to prioritise environment over air travel, the reality is that the French had far more options than the UK would.I doubt the UK govt will change their mind, the Heathrow saga has gone on far too long already and has massively contributed to the whole idea that the UK is now unable to undertake any major infrastructure projects (HS2 suggests that the perception is grounded in reality!).My very personal opinion, and with absolute no evidence to back it up(!), is that post Covid air travel will gradually return to the levels of 2019 but that it could easily take 5-10 years to do so.  If that happens then the UK needs more air passenger capacity. I also suspect that there will be improvements in aircraft design which will reduce emissions and noise issues.  My view is that we do need to build in more capacity even though there are some environmental concerns - it just means we need to work harder at reducing emissions from other parts of the economy

Justin Stephenson ● 2083d