For a moment there I thought you were talking about class 9F steam locos....then I realised that you were talking about electric locos 92 021, 92 045 and 92 046.
Someone else who was obviously under the same misapprehension as myself!
While I have no evidence either way, I wouldn't be surprised if class 14s - either singly or in pairs - may have occasionally rescued failed passenger trains, either loco-hauled or DMU.