The study found that double-track high-speed connection on the same route would cost 3.6bn (4.4 times greater than for classic speed).

One common complaint users shared towards the site regarded the typically extremely slow download speeds, which were known to go as slow as 10 kbit/s on a high-speed connection.

Common complaints are sudden network 'outages', which cut off thousands of people at a time, high-speed connections that operate at a crawl and paltry responses from customer service departments.