It looks like the link pointing here was faulty. Maybe try searching?

Learn to Dive Guarantee

Love it or your money back! When having a go at something new it’s essential that you feel confident and comfortable with the idea. The Emperor team is so certain that you’ll love learning to dive with us that, at the end of the first day of tuition if you decide not to proceed, we’ll give you your money back.

Please read our full Terms & Conditions (PDF).