All four answers thus far have been helpful.
I suspect the breakthrough is the answer from Fletcher-4797.
From this answer I have concluded with reasonable certainty that Plumbridge-31 is from the information provided in this reply and the date of birth should have been 1794. 1841 census information refers to a different James Plumbridge (one without an existing WT profile) and that James Plumbridge is from Ockham and married Harriott Channell. I have four generations of this family that I will write up.
The death record provided by Poole-4523 almost certainly refers to the other James (not Plumbridge-31) but I will check a bit further to satisfy myself of this.
Thanks to all (and happy to receive anything extra).