Due to the numbers of F-35C pilots the MOD seems likely to get, both the RAF & RN will indeed be using T-45 Goshawks for training.
NAS Pensacola will welcome those UK aviators with open arms... every year.
BTB... the final T-45 (the 221st, a T-45C) was delivered to the USN on 29 November 2009... so the production line has been closed for almost a year.