Thanks for that spinemaligna. According to the "Radio Times" online listings, the next "Trainspotting" is next Saturday at 2100hrs (repeated Sunday 0400hrs) and then at these times for at least a further 4 weeks. The Discovery Channel website has continuous "No Programme Information" shown against most slots - almost as if it doesn't know what's on its own channels. Again most helpful of them.
As for the other programme you spotted, missed that too. Not had much luck this week - and the other half has been out in the evening so no excuses for missing anything
Trouble is, "channel hopping" is about the only way we catch programmes tailored to "our needs" as they are few and far between and not widely publicised. On the other hand, if you're a fisherman....