Joe Aribo was adamant that he had been fouled by Rutter in the build-up but Darren Bond waved away the protests and Yankuba Minteh was left with the simple task of rolling the ball across the six-yard box for Rutter to prod home his fifth league goal of the season.
It was just a temporary reprieve as another brilliant touch from Joao Pedro sent Mitoma clear and the Japanese forward coolly dinked the ball over Ramsdale to score his fifth goal in seven games and cue a mass exodus in the home stands.
Goals from the excellent Joao Pedro, Georginio Rutter, Kaoru Mitoma and Jack Hinshelwood were more than enough to condemn the Saints to a 21st defeat of the season and leave them on just nine points, two fewer than Derby’s record low total from the 2007/8 season.
The Seagulls were not to be denied for long and hesitation in the Saints defence was pounced upon by Joao Pedro who coolly scooped the ball over the advancing Aaron Ramsdale to give Fabian Hurzeler’s side a deserved lead.
Those who had remained saw Brighton add a simple fourth as Brajan Gruda’s corner fell to the unmarked Hinselwood at the far post from where the 19-year-old scored his second goal of the campaign.
