for those curious what's notable about this - other than a new major tube line in London is rare - the project was around 5 years late & around 4.7 billion euro

for those curious what's notable about this - other than a new major tube line in London is rare - the project was around 5 years late & around 4.7 billion euro over budget - by comparison - the german airport that opened last year in Brandenburg - was 5 billion euro over budget & 9 years late -