This is my first question here, hope it's not too oft-repeated!
I recently submitted an application to LEK's London office for the 2020 summer internship. It was the first of a few applications I'm submitting (of my first ever applications), so the CV I submitted was quite bad and has improved a lot since. By bad I mean it was 2 pages of lots of waffle, some inconsistency, and even a couple of small typos. After several iterations via other applications as well as peer-reviews, it's now a lot better (a single page, better formatted, more specific, more relevant, better language, etc.).
Is it a terrible idea to send them an email with the updated CV? Or maybe email in to withdraw the application and then submit a new one with a different email address (still a few days till the deadline)? Or best to do nothing at all and hope it's somehow good enough?