Here's my suggestion if you're trying to avoid saltiness:
Use stock to make the gravy, and add a bit of the pan dripping to said gravy. I know, I know, it sounds like cheating, but truth be told a good
turkey or chicken stock (not canned crap with msg) is going to have a lot more flavor from the veggies and spices than straight ahead pan drippings.
However, as a Scot, you should wrap the turkey in the stomach of another animal and then deep-fry the whole thing.
"How is it that hardly any major religion has looked at science and concluded, 'This is better than we thought! The Universe is much bigger than our prophets said, grander, more subtle, more elegant. God must be even greater than we dreamed'? Instead they say, 'No, no, no! My god is a little god, and I want him to stay that way.'" - Carl Sagan
"To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection." - Henri Poincaré