Living in Germany I obviously can't comment on how the system works over in the UK but for those who tow a caravan I highly recommend contacting Mazda UK and enquiring whether the caravan is also covered in the event that the towcar needs to be trucked off somewhere. I never did receive a satisfactory answer when I put the question to Mazda over here and as a result decided to continue with my ADAC membership who do include the caravan recovery if required.
On the plus side, the Mazda recovery service is automatically renewed indefinitely following each and every obligatory service and not for the first 3 years as in the UK I believe.