Blimey - bread sauce just adds so much to a Christmas feast! It's easy to make, and make ahead, so don't sell yourself short on the day - have it ready and waiting in the fridge to be heated up. This is my family recipe passed down three generations, how many Christmas feasts is that??
If reheating after storing in the fridge, you will need to add more milk as it will have become very thick overnight. Just stir and add milk over a gentle heat until desired consistency is reached.