Basil Jet wrote:
"The Battersea Branch will be the first extension to the Underground
network since the Jubilee Line Extension from Green Park to Stratford"
is sortable by opening date, forgetting
https://en.wikipedia.org/wiki/Heathr...inal_5_station is a major
You're quite right, of course, but I suppose they don't regard the
additional Heathrow station as an extension.