Flange lubricator’s reference to non stop trials in 1965 between Dublin and Cork reminds me of a fact that most people seem unable to grasp - it’s not how fast you go, it’s how slow you go ie the number of speed restrictions and stops govern the overall journey time. I know that IE recently conducted some high speed trials between Dublin and Cork but did they lead to anything? CIE, and BR, seem more interested in running what used to be called semi fast trains.
Stephen