Congratulations on your upcoming wedding. I'm a Registrar here in Scotland (I register all the births, deaths and marriages in the area) and I absolutely love doing weddings at Christmas. Gives me a chance to really go to town. The fact that the couple choose that time of year to get married means that they love the season as well so it makes it really special for everybody. I usually have the room decorated with candles and white lights on the two small trees with silver decorations. That way, whatever colours the bride chooses, work perfectly.
Would love to see some pictures afterwards (she hinted subtley!!)