I dropped the inklings line of research a couple of months ago when I noted the JRR Tolkien / CS Lewis / GK Chesterton angle leading off down a strongly theistic / catholic path, despite the interesting connection with Owen Barfield, and the Cambridge connections of Lewis / Barfield and (non-inkling) McLuhan.
In response to a question in the Pickerell last night I checked this out. No doubt Tolkien would have visited CS Lewis in the latter’s time at Cambridge (Magdelene), and conceivably visited the Pickerell haunt of Lewis, but the Tolkien Society’s biography includes not a single mention of Cambridge at all. Oxford all the way.