Quote from the programme description “It’s almost 40 years since steam disappeared from widespread use on the railways, but the development of steam locomotives has never stopped.”
Thanks for the tip. Interesting program. Of course, any large scale return to steam power for railroad use is fantasy. Advances in steam technology have greatly benefited stationary sources.
BTW, BBC4 has hundreds of science and technology programs which are largely free from political hysteria and available for listening online for free.