Granting an assured tenancy is a good option perhaps for student lets, but perhaps not others.
The tenant will have full security of tenure and a landlord is unable to issue a section 21 notice.
However if the tenant becomes two months or more in arrears then it is relatively easy to get the tenants out.
The Guild of Residential Landlords can supply an assured tenancy and you should contact the Guild before granting this type of tenancy. We have a special guidance document available for members only.