Subject: Application Error – Seeking Advice

I just submitted an application for an apprenticeship role with Centrica and realized that I forgot to include my highest qualifications, which are my high school standard grades (Scottish exams).

Now I’m trying to figure out the best course of action:

1) Should I leave it as is and hope for the best, mentioning my experience in other administrative roles instead?
2) Should I reach out to them and explain the oversight?
3) Should I submit a new application using a different email while keeping everything else the same?

For context, I am currently enrolled in college pursuing a Level 1 SVQ in a related field, which I would be able to present if I were successful. Any advice would be greatly appreciated!