The relevant Postgraduate Dean will be your Responsible Officer (see Who is my Responsible Officer?). 

All trainees undertaking Post CCT Sub Specialty training will require a formal ARCP to review their progress and which will also include a review of the evidence relating to revalidation. 

It should be noted that a revalidation recommendation may not be made at the end of the Sub Specialty Training Post, as the trainee will not CCT at this point.