It kept him out of the dour encounter with York, but an X-ray this week has revealed there isn't a fracture and he was able to train last night.
With Chocky Davies likely to be out with an ankle injury, and Anth Carr on a sojourn with Henry Tones, Jonny's return will provide some experience to the pack.
Both Paul Rudd and Jon Norris impressed on their their returns to first team duty last week as did Phil Henderson who marked his return with the first try.