I always think that Christmas Cakes aren't really right until they are decorated. Decorating the cake is very much an individual thing, I vary mine every year. I like to get my eldest daughter in on the act, she loves shaping and eating the icing. Below I have included a few ideas to get you going.
Prep: 15 minutes plus 3 hours freezing
Prep: 15 minutes
Cook: 30 minutes
Prep: 15-20 minutes (soak fruit for 2-5 days)
Cook: 2 hours