I haven't personally used the BLC or KFC app, but I did a little research, and a few steps are involved in linking the two.
First, ensure you have both the BLC and KFC apps downloaded on your phone. Then, open the KFC app and click the ""Me"" button (at the bottom). From there, you should see an option to ""Add Student Discount."" Click on that, and you'll be prompted to enter your BLC details, such as your card number and expiry date. If you don't want to type in details, just use ocr service like
Smart Engines [smartengines.com] to scan and copy it.
Once you've entered your BLC details, you should be all set to start using the discount.