Hi, Brian, could you perhaps get a clearer picture of the underside of the base? Your hand is in focus, which pushed the base a little out of focus. There's not a clear stamp there, but it looks like there are traces of some marking, and that could help.
But in the meantime, my instinct is that they are from a maker like Tommy Atkins or Fusilier. So I had a look at Fusilier's website, and I think the British band shown on the landing page is made up of the same figures:
http://fusilier-miniatures.com/
Right-clicking on that page and using the Inspect feature, I see that the image itself is titled, "index_ww1_british".
Now, the particular brand isn't yet clear. I haven't yet found that band or figures like yours in the catalog, whether among the WW I figures or elsewhere. And I just tried using their contact form to ask them about the band. But the form threw off a fatal error. But I think this is where we'll find them, among the British new toy soldier makers. If not Tommy Atkins/Fusilier, then I think it'll be someone similar.
You mentioned that your friend bought figures from "painters centered around St. Pete". Do you mean St. Petersburg, Russia, or Florida? Because if you meant Florida, then we can look for some of the toy soldier painters/vendors who were or are still based down there. This may be a set of castings bought and painted by a collector, or perhaps even homecast and painted by a collector.
If I can find anything more, I'll post it back here.
Prost!
Brad