TLDR: You can share a mortgage offer or agreement in principle; if unavailable, select 'I don’t have this right now' to add it as a pending task before submitting the Source of Funds.
Sharing evidence of your mortgage
If you do not have a mortgage offer, you can instead share a mortgage agreement in principle if possible.
If you do not have a mortgage offer or mortgage in principle, you can select ‘I don’t have this right now’ at the bottom of the screen. It will then be added as an outstanding task for you before you submit the full Source of Funds task.