Legacy protected sdp

Hi did ask this but on end of previous post so thpught id do new post .

I have sdp and wrag amount ( from when you had a amount for being in wrag ) on my universal credit now . I was on esa income based and was moved over by dwp to uc in december hence my transactional amounts protected. My daughter is moving in in a while, and know i will lose my sdp , but was wondering if you knew how much the deduction that would be ?
Many thanks