thanks debbie for the response....For immigration purposes, a PCC is valid for twelve months, as long as you sent it immediately you received it(i.e. before the three months benchmark).
The only way you would be required to send another one is if your application takes more than twelve months after you sent it, which would not happen.
It can not speed up things, for Nigerian applicants, PCC expiry is three months, and we are still all waiting, so just relax your mind.
It is well.