Hi, well since You are considering to travel during winter time in Europe i think best option for You is to go to Asia. Southeast Asia can be nice and very good expiriance but if You really want to see something completely different i suggest You to go to India. Its a very uniqe culture, all people speak english and your money will get best value. Anyway don t bother yourself too much about where to go. With british passport it s quite easy to travel so enjoy wherever you go. It s great to travel around this beautiful planet.
Very best and good luck