Mechanism of isomerization of ortho or para bromo phenols in superacids

In superacids ortho or para bromo phenols are isomerized into the meta bromo isomers. In SbF₅-HF, the process is intramolecular and proceeds by a 1,2-Br shift. In CF₃SO₃H, the mechanism involves loss of bromine, followed by meta bromination.