This is what I have so far but not 100% sure so any help would be appreciated.
BP DON L S some research indicates it is from 1837-38 possibly Britannia Plate or Markers Mark Benj’n Pemberton.
It appears to have a gold wash
Britannia Plate is the right answer. DON is a trade name of Cooper Brothers & Sons Ltd of Sheffield.
You will find confirmation on the same site where you found the information about your Wingfield spoon.
Phil
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Great Thank you so much 
I found this same spoon! except mine doesn’t look gold.
I was trying to find some information on it, did you ever find anything?
There is nothing more to say about this spoon beyond what has already been posted - unless you have a specific unanswered question.