Chas4444
New to model railways.
Can Bachman and Hornby couplings work together please?
Replace them both with Kadees.
Best move you can make.
Roger is correct. However, if you mean the Hornby 2-6-6-6, the answer is "no"for the as delivered coupler, which resembles a European coupler. However, it has included both a knuckle coupler and a horn hook.
In addition, the assumption is the Bachmann coupler you mention is the current coupler as, in the past, Bachmann used the horn hook.
Gene