I can confirm that, and add Safari to the list. Works in Chrome and in IE.
Right, I worked it out. I had copied the public links to the mp3s starting with https -> no joy. Changed those to http, and it fixed the feed.
Forbidden by the TOS? I hadn’t noticed. I must read them more closely again!
The links work on the website, but enclosures don’t.
This is fantastic! Thank you.