And... if you notice, the modern Bailey caravan has also got a Status omni-directional roof aerial fitted too which proves that it still must still the best for TV reception which I would imagine in Australia, TV masts are very far and few between in the outback territory.
Oz and NZ are a captive market for UK caravan makers because caravans sold there must have left hand side doors, ie German makes need not apply if they are not prepared to make rhd market specific caravans. Adria market their UK models in Oz as well. Oz built caravans are mostly off road capable and much more expensive than UK built on road caravans. Video does state that caravan is for on highway use only.