Thanks.
Sorry - that was a typo!
It’s ‘Lect 08’, ‘Lect 09’, ‘Lect 10’ etc.
If I’ve been doing the ID3 thing right, I’ll have a bit more of a playabout with a variety of files, including the extra zero renaming, and post back later. My broadband is slow uploading, so it’ll take a while to get things on dropbox anyway.