Yes, tenants are generally allowed to hang pictures on the walls of a rental property, provided that they do not damage the walls. Tenants are responsible for returning the property to the same condition it was in at the start of the tenancy, and this includes repairing any holes or damage caused by hanging pictures or other items on the walls. Tenants should ensure that they use appropriate hanging methods, such as picture hooks or adhesive strips, and should avoid using nails or screws that can cause larger holes or damage to the walls. If in doubt, tenants should seek permission from the landlord or letting agent before making any changes to the property.