I am fortunate to have seen the DVD of the cine record issued by the people involved. It was shown to a Social Activity Group in Edenbridge , Kent and I believe it was accompanied by the tale, an innocent challenge in a Liphook pub, told by one of the members. I was allowed to borrow it. It is a fascinating journey covering all the continents; the trials and tribulations of living in and driving a double decker bus through every terrain and weather and the accompanying folk music of the time that earned them their slice of fame as well as paying for day to day living. I recommend it, what an adventure.