"fastest speed record..red Fiat Panda..four occupants..a dog whilst driven through Dartford Tunnel"
Hyperloop is meant to be fast.
IE multiple Mach numbers.
This is what allows you to stuff a lot more passengers in a lot narrower cars because a)They won't be on them long. At Mach 1 a kilometre is <3 seconds.
London to Birmingham. 126 miles. About 10 mins at Mach 1.
London to Manchester 200 miles About 16 mins at Mach 1.
London to Glasgow 412 miles About 33 mins at Mach 1.
London to Edinburgh 414 miles About 33 mins at Mach 1.
London to Aberdeen 542 miles About 44mins at Mach 1.
So from one end of the UK to the other in the time someone takes getting from the outer London suburbs to central London by "tube"