Northgate Information Solutions has been bought by a private equity firm in a £1.1bn deal. The IT firm's buyer, Kohlberg Kravis Roberts & Co (KKR), has announced plans to expand in local government, education, criminal justice and health, with further acquisitions. Chris Stone, chief executive, said today: ‘KKR's investment approach makes it an ideal partner for Northgate. And the opportunities for us to expand our public sector technology services business under its ownership are extremely exciting. ‘Under our new ownership, we shall continue the drive for public sector excellence through innovation.'