Symmetry: 180 degree
Size: 169 cells
Theme:
Eight clues contain superfluous words, whose initial and final letters may be arranged to form REVERSED and CROSSING respectively; unchecked letters in their lights may be arranged to form THE GOONS. Centre of main diagonal is THE IRISH SEA, crossed by GNIKLAWMI (ie, I’M WALKING backwards); all other lights crossing it are similarly reversed.