I'm from Northamptonshire and living in Kent. Pam's family are from Yorkshire and Scotland. Both families have always served a choice of Bread Sauce and Cranberry Sauce, or both, with Christmas dinner.
What I can't abide is all the eateries that are currently adding Yorkshire Pudding to their 'traditional' Christmas roast. It just doesn't belong on the festive plate. I've even had to settle for salmon or steak to avoid it.