Which tenancy

Hi All, I have been approached to manage staff accommodation, I have checked with the local authority and apparently it is not a HMO. There are several rooms within a 2 storey building although the ground floor is storage sheds so not accommodation. There are also single lodge's
The tenants have a choice to rent these rooms/lodges those that do have the rent deducted from their wage and currently on a licence tenancy due to should the need to dismiss them from employment with immediate effect then they must leave the accommodation immediately? and any rents prepaid will be refunded to them. I have read both license and ASH . Which Tenancy would I use???