7: Waking Up in the Sun - 2000AD prog 798

London: July 8, 1992: Zenith and St John are hiding out and recovering in a destroyed London, when Zenith feels ice forming on his fingertips and hair. He sees DJ Chill coming at him, freezing him, and blasts back with a bolt of fire from each hand, setting DJ Chill alight. Lux (still in his suit) and Ruby and Spook (who have now taken up their ‘shining’ bodies) arrive and stop the flames. Peter opens up a portal, and drags Zenith through.
Peter shifts them forwards in time; weeks or months - he isn’t sure. They find themselves inside Westminster tube station and, as they climb outside, they find that the world is dark and that the sun is black.