This 23 December 2019 video says about itself:
Luxembourg is about to embark on an experiment into whether offering zero-fare public transport will persuade people to leave their cars at home.
In 2020, it will become the only country in the world to get rid of fares on all its forms of public transport, in a bid to tackle increasing congestion.
A commenter on YouTube writes:
UK will increase the prices of public transport to drive the population to suicide, thus tackling the problem.
Tories accused of attempting to bury news of rail ticket price hikes: here.
Another commenter replies:
Sheffield had free public transport, Margaret Thatcher made it illegal.