Google link below, British bred, I didn't have time to read the links to see if a specific company was mentioned if that's important to you.

I also checked the NCSU Cultivar list and it was not listed.

Carolyn

Here is a link that might be useful: Tumbling Junior

Hi Carolyn-
Thanks! Google is where I also started, but found no reference to the breeder other than the UK reference. I want to see if they have a red version in the works. The habit of the yellow junior is ideal for my purposes, but unfortunately, the tart taste is not to our liking. I start these in February, and by mid-June, they are producing like crazy. For me, some have a bit of sweetness, but most are nearly sour. These grow very well in a 12" basket.
-WC2K8

Found it! Unfortunately the breeder is mostly working on indeterminate varieties with no "Tumbling Junior Red" in the works at this time. Looks like back to "Tumbler." I've started some original Tumbler and Tumbling Junior seeds side-by-side so that I can compare their growth habits. If necessary, I guess that I can prune Tumbler a little to keep it under control in the cold frame. Anyway, Tumbler is always very early for me, so maybe this is the best choice.
-WC2K8