We have now gone out there for three years for Christmas. Being a coeliac normally the menu is significantly reduced in most places; but at the Hall, if you book in advance they will bend over backwards to accommodate you. The only thing on the Christmas menu they couldn't do as gluten free was the Pork!
Great three course meal; friendly service. Highly recommend. They may be able to accommodate GF on short notice; but definitely can if you are booking.