OK, thanks for the update. I contacted Mazda a while back with the 'what if' question scenario and was advised that a replacement vehicle would be made available although they couldn't guarantee that the replacement would be fitted with a towbar. This is very much in line with what you have stated.
This obviously leaves open the question of whether or not a better option would be to contact the ADAC of which I am a member. in the event of an incident occurring, who at least guarantee onward travel to ones destination including the caravan leaving Mazda to sort out the problem with the car. Hopefully I will never need to put the theory into practice.