If you have already applied for student finance for the 25/26 academic year, you should contact the Student Loans Company directly to inform them of your course change.
The link to the undergraduate and postgraduate taught student transfer, suspension and withdrawal procedure can be found here: Student Transfer, Suspension and Withdrawal Procedure
The Man Met Students Union Advice Centre is able to provide you with specialist, student-centred advice that is free and totally independent
If you are an international student, your course transfer may not be possible under the conditions of your current visa. You should seek advice from PBSReporting@mmu.ac.uk before proceeding with a course transfer request. More information regarding changes of circumstance for international students can be found here: https://www.mmu.ac.uk/study/international/when-you-have-an-offer/secure-your-place/apply-for-your-visa/if-you-make-changes