It would seem if a caravan is placed in a landlords garden, the appropriate tenancy would be an assured shorthold tenancy. This is assuming the caravan is fixed in some way and not moved and that the utilities (water, electric etc.) are never disconnected.
A tenancy is assured (shorthold) if it is let as a separate dwelling [s.1 HA1988]. The case below although dealing with Rent Acts, deals with the question of dwelling and if a caravan can be a dwelling ... Please login or signup to continue reading this content