You have received a request from a tenant to be allowed to put a vegetable patch into the back yard. 

1. What parts of the terms and conditions of the tenancy agreement/legislation relate to this tenant's request?
2. What information will  need to obtain from the tenant about this request?
3. The landlord has come back  to give permission, provided that the tenants pay for water usage and make good the area when they leave the tenancy, back to how it is now, a grassed area. 
4. What will be needed to do to monitor this tenant request moving forwards to keep both parties happy?