Vaclav Halek - composing Christmas music from around the world

Some of you might remember a programme a few months back about a very unusual composer called Vaclav Halek, who has composed more than 2,000 pieces of music based on the "song" of the wild mushroom. Well Mr Halek also composes and arranges Christmas carols, and not just Czech carols, but Christmas music from all over the world. Rob Cameron went to meet him.