The application window for the Cambridge MPP is currently open and the closing date for receipt of applications is the 28th of February 2014.
Full details of the MPP can be accessed on the main programme page and all applications must be made through the Graduate Admissions webpage. Applications are considered on a rolling basis but cannot be considered until all of the materials required are uploaded and incomplete applications will be rejected.
All that said do get your application prepared as the next class of the Cambridge MPP is already forming.