…Matalan.
Alright it was cheap and cheerful but for heaven’s sakes if they are going to flog something as post-surgery with pockets for prostheses then it should actually function!
The pockets are made of non-stretch material and the holes so tiny that you cannot actually insert a prosthesis into it. Mine are only B cup size so god knows what bigger women are supposed to do!
Many women who have had mastectomies are prone to swelling and lymphoedema around the chest and under the arm - it is really important that the sides of the bra are wider than average so they do not act like a tourniquet. Not this one. It is basicaly a bog standard cheapo bra with a couple of unusable pockets shoved in it and marketed as a postsurgery bra.
Avoid like the plague!