What can I do if the landlord allows family to use the shops on our rented property?
Full Question:
Answer:
This could depend on the terms of the lease. If the entire property was part of the lease then there is no right for them to occupy or use part of the leased premises. If the shops were not includes in the lease and this was clear then they could continue to use them. If the shops were not mentioned in the lease and are on the property covered in the lease they do not have the right to use them absent a provision in the lease to that effect.
Every lease has an implied warranty of quiet and peaceful enjoyment. If this use is disturbing your enjoyment of the property that could be reason to terminate or take other action. On the other hand, if the shops were excluded from the lease your expectation that they not be used may not be reasonable. Hope this helps.