Just to add to the confusion IceTV has an episode entitled Extreme Railway Journeys (London To Monte Carlo) scheduled for Monday 4 May at 4.30 pm. I've seen the description for this particular episode (London To Monte Carlo) fairly recently, again possibly under an incorrect title, so took a look at the SBS schedule and discover that they are now listing it, probably correctly, as Great Continental Railway Journeys.
So it looks like SBS had found yet another way to mistitle Great Continental Railway Journeys, presumably in what was provided to IceTV, and like the program scheduled for Saturday 2 May, since corrected by them.
At least the corrections by SBS provide some ray of light in an otherwise scenario of apparently capricious random mistitling of this series.
For the record London To Monte Carlo was the very first episode of the series Great Continental Railway Journeys, so S01E01.