In order to send the full UC statements you can either:
Screenshots: Take "extended" or "full page" screenshots which scrolls down as you are taking the screenshot so the full webpage is taken in the one UC statement.
PDF: When you're within your UC account there should be a "Print Statement" option. Open the UC statement, press Ctrl+P to open the Print dialog and change the destination printer to “Save as PDF”. Hit the “Print” button and the webpage will download as a PDF document. You can then attach this pdf to your application.
This also works for your bank statements.