Thank you
GDC site has some contradicting (right word?) info as it also says
"If you are already registered and have since qualified in another area, you can request the relevant dental care professional title to be added to the register. Please complete the personal details, qualification and payment sections of the application form and return it to us with a £12 administration fee. There is no additional annual retention fee for any extra DCP titles you have."
Doesn't make sense!!