There is disclosed a labelling group for advancing a series of labels to be applied onto relative articles. In one implementation, the labelling group may include a first drum adapted to convey a strip of labels along a first path and towards a transfer station; a cutting mechanism adapted to cut a sequence of single labels from the strip; a second drum fed by first drum with cut single labels at the transfer station and adapted to convey simultaneously a required number of cut single labels along a second path. The first drum may move at a first tangential speed at the transfer station, and the second drum may move at a second tangential speed at the transfer station, where the first tangential speed is different from the second tangential speed and is adjusted on the basis of required number of cut labels to be simultaneously conveyed on second drum.