@patricksnape  Any chance this should be:

    lmark_group = LandmarkGroup(
                self._target, group_label, value,
                {'all': np.ones(value.n_points, dtype=np.bool)})

? 

The following seems to be broken in master at the moment:

    %matplotlib inline
    img = training_images[0]
    img.landmarks['new_landmarks'] = training_images[0].landmarks['PTS'].lms
    img.landmarks['new_landmarks'].view()