It says on that website that the theory is separate:
"Cost of the ATPL theory program: 1500GBP and 300GBP per week of “brush up” course (in total four weeks).
Cost includes: OAA books of ATPL subjects, distant access to Oxford Aviation Academy ATPL distant training course and mentoring while in OAA for brush-up courses."
I would recommend getting an MCC somewhere though. I talked to a pilot at Emirates a while ago and he says that nowadays an MCC is quite important, and looks good in the interview.