Student Finance Supporting an Application

Given the new rules on mortgage interest and how it inflates income (but comes out in the wash if you are 20% tax payer) does anyone have any experience of whether SFE accept the net profit figure ie ex mortgage interest payments ? because it creates a variance between SFE application and HMRC tax return.  It is going to impact university bursary ALOT if they take the gross figure and disregard the mortgage interest payments ( which is contrary to how tax credits calculate property income, who DO use the net figure). Anyone been through this and seen how SFE actually deal with this issue ? thanks