I don't think it is an original bracket since the end is square. Original Ariel brackets have rounded ends. So cut it off, repair the mudguard and make a new bracket (with rounded ends).
36 4G, 37 VH, 53 ex ISDT KHA (project), 54 KH(A), Healey 1000/4 (project)
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser.