Classification of the most interesting extended ionised features identified in the 13 QSO2 of our sample. The ‘giant nebulae’ describe large continuous reservoirs of gas with sizes > 35 kpc that are not identified with bubbles, tidal features (bridges or tails), with star formation (e.g., spiral arms) or with detached features (e.g., distant patches). ‘Jet-gas interactions’ refer to emission line features that are closely correlated with the radio morphology. This correlation indicates an interaction between the gas and the radio source. ‘Star formation’ encompasses detached compact knots and SF in spiral arms. ‘Distant patches’ refer to detached patches of ionised gas located at large distances from the AGN (tens of kpc).