Gambling stocks took a nosedive on the FTSE 100 Index this morning, with Ladbrokes and Coral owner Entain leading the decline. The sharp drop came in response to reports that Chancellor Rachel Reeves is considering a £3billion tax raid on the industry in the upcoming Autumn Budget on October 30. Entain’s shares plummeted by nine per cent, whilst other major players in the sector also suffered significant losses. William Hill and 888 group Evoke saw their stocks fall by 12 per cent, with Paddy Power owner Flutter and Rank, which owns Mecca Bingo and Grosvenor Casinos, both down five per cent. T…