I went to check my watched threads and found the Gareth Malone webchat I had saved for later.
So you know the app weirdly skips chunks of long threads? Well in this case it skipped from GM's arriving on the chat ("lemon drizzle with blueberries" which is definitely on my "to try" list) to an hour after the chat had finished 
Please please please can the next incarnation have options to download in-between messages?