Hey @JSW, thanks for this suggestion - and apologies, as you’ve stepped on a landmine while trying to help!
Anything AI is an absolute no-go for this. There were some strikes about it a couple years ago, you might recall 
These scripts are generally uploaded in good faith as library references for writers such as myself to read, and invariably with the explicit stipulation that they not be fed into AI/LLMs. I’m being very careful about how I OCR them to the same ends (though generally I’m finding they already have been OCRed).
So while I’m sure it would make this particular task much easier - it will have to be the long, tedious trial-and-error ‘old school’ route. However much it makes me bang my head against a wall in the meantime!
For anyone interested and as I was asked before, the BBC Script Library has plenty of script examples to see formatting. (And also an example of such stipulations at the bottom of that page 
)