Transfer From Commercial banking to Private banking?

Hi!I will do a commercial banking internship in hsbc uk this coming summer. For some reason,I want to work in private banking for full time. If anyone here have similar experience can give some advice about transferring from commercial banking to private banking?

And specifically, if by any chance i get a return offer in commercial banking graduate program after summer, can i talk to HR to request to transfer to private banking? Some of my friends tell me it is doable, then i will only have to take one more interview but i don't have to go through every application step like normal way( knowing that if a student applies for graduate program, he has to go through from online application, online test, video interview to accessment center...). Did anyone who worked in hsbc have gone through this divsion transfer?

Thank you for your advice!!!!!