It'd be very unusual to transfer-in to any university just for the final year. You'd need to check with the university to which you want to transfer and check what their rules are.
For example, Manchester's "Undergraduate Degree Regulations",
here, say the following in section C:
"C. Accreditation of Prior and Experiential Learning - AP(E)L
5. A maximum of 120 credits of a three-year Bachelors degree, and 240 credits for four year Bachelors degree can be considered for AP(E)L.
6. AP(E)L may be used in exceptional circumstances for entry into Level 6 (or 7 of an Integrated Masters). However, a case must be made to and approved by the Faculty."
Their "Guide to the Taught Degree Regulations",
here, also makes a similar point:
"While we wish to acknowledge prior learning/experience, it is a principle that at least half of the programme should be assessed at the University of Manchester..."
Do check with the admissions team at Manchester, but the above would suggest a transfer from Warwick into the final year at Manchester is not an option.