Hi Bigfootuk,
In this modern age portfolio has become something crucial in interviews. If you appear in interview without your portfolio, it won't get you shortlisted. It is your actual confidence and you speak through your portfolio. If you have done some projects, throw light on your part.
If in any case you don't have portfolio, no worries, prepare it keenly, contact with relevant industries and organizations and offer your services either free (internship) or at nominal price. The real reward you could get by the end is your Portfolio.