Before seeing your Christmas bubble......Keep 2m distance, wash hands, and wear a mask where needed. Reduce contacts 10 days beforehand (especially if there are vulnerable people in your bubble). Plan ahead - think about space for seating, ventilating rooms and cleaning products.
When gathering with your Christmas bubble.......Avoid close contact as much as possible, use space wisely and spread out seating. Open windows and doors to ventilate where it is safe to do so. Wipe surfaces regularly and wash hands often especially before eating. Don't share things like utensils or towels.