Buying a property to let is not the same as buying your own home. Mortgage lenders will want to know that a professional agent registered with the appropriate governing bodies has been advising on the selection of properties suitable for letting.
The experienced agent will know the local market and be able to advise on what the demand is like for the different types of properties, for properties close to schools, transport links, rural properties and the many other factors affecting the ability to rent a property. Also the agent will be able to advise in what condition the property should be in order to maximise the rental income on the property.
Knowing that the management of any inherent risk (the mortgage) is in the hands of a professional agent enhances the creditworthiness of Buy-to-Let propositions put to mortgage lenders, as they will have a greater knowledge and understanding of what risks are involved in the management of property. They will also have much more experience in dealing with potential problems that may arise.