Nice!
Looking through your recipe I was going to ask whether you could use something other than bakers yeast (which is a relatively recent invention) and then saw Anatolii’s post:
I would have guessed it might have been sourdough type yeasts - have you tried that Dave? I would definitely consider it - sourdough yeasts are said to be more beneficial than bakers yeast since they are a natural fermented food, containing wild yeasts and lactic acid bacteria 