Prey, do tell, what is so banana republic about having the UKs major cities all connected to each other by a fast railway system. Inter-City 125 anyone?Especially when all of the direct A to B routes are under 200 miles, and well under 150 miles in a lot of cases.
But if you look at France it is a different picture. Its major cities are not on each other's doorsteps like, say, Glasgow and Edinburgh or Leeds, Sheffield, Manchester and Liverpool are; they are well spread out
Paris to:
Lyon 400k / 250M
Bordeau 500k / 320M
Tououse 590k 370M
Marseille 670k / 410M
Those journeys do justify a fast train so long as your departure or destination is Paris.
But what if you want to go city to city? Yup, you got it, banana republic rail it is:
Marseille to Toulouse 320k / 200M = 3.5 hrs
Bordeaux to Lyon 420k / 275 M = 5 hrs
Nantes to Montpellier 580k / 360M 6.5 hrs
It's good to compare and contrast.