If the commercial letting is for offices, there is a form of waiver which can be used, but it must be before the lease starts. The practice of temporarily vacating a property is fraught with danger - the courts may well look through such an arrangement.
Bear in mind that for a retail unit, there are valid policy reasons why a tenant should have security of tenure; While the building belongs to the landlord, the business may be one which has been built up by the tenant, and the value built up by the tenant in the business may well be inextricably connected to the business location. So if the landlord puts the tenant out, the tenant loses the asset which he built