Thanks, John.
I realize that that is what I was doing, but what I was having trouble finding the name of the source video.
The project can be guaranteed not to have just one source media, as there will be previous subclips around, which are also media items.
I imagine its fairly straightforward to get hold of the source media’s path, but I just couldn’t find out how to.
If anyone has any pointers, I’d be grateful!
Dave