You can click on the Findit@UCL link to see whether UCL's libraries have the article you need electronically or in print form. If the article is available electronically, you can link to it from the window that appears. Otherwise, from this window you may Check UCL holdings in Explore to check whether the journal is held in print.
Where you see the Findit@UCL icon, click on it to link to the full text.
Sometimes you will see a link to the publisher's site. Unless the article is open access, you might find that you can't reach the full text.
Clicking on the Findit@UCL link instead will link you to the full text via UCL's subscription access, if available.