I am really struggling with the sourcing system when it comes to New Build. To be honest I don't trust it, especially with Barclays products!
You have all these options in the sourcing tab but not a New Build one. Please scrap the requirement to put a properties age and just add a tick box for the property being a New Build.
Lenders have different criteria on what they class a 'new build. By adding a tick box for this option would require the system to set a default for what it classes a property age to be 'new build' which could they result in incorrect product being returned.
Users would still need have the same level of interaction with a tick box as add a 1 to the property age months field or tick a box which could then provide incorrect inaccurate results.