Last year, I asked whether BR Mk4 sets had ever been hauled by anything other than Classes 89, 90 and 91. Turns out that 47s, 31s and 67s have also done their bit in the past. This time I am interested to know whether a class 43 HST power car has ever been replaced in service at one end (or both?) with anything other than a class 41 (prototype), or the 91s used when the 43s were modified after the 91s’ introduction? I imagine the answer is no - but kinda hope I’m wrong!