A new revolving credit facility has also been agreed with HSBC and Natwest banks, maturing in December 2022.
Chief financial officer Paul Quested said: "We are very pleased to have successfully secured the long-term refinancing of the group.聽 This now ensures that we have the appropriate facilities in place to continue delivering on our strategic priorities and the Group's full potential."
HSS made a pre-tax loss of 拢85.2m in 2017 and a 拢17.4m loss before that in 2016 but a major restructuring has been put in place to turn the business around.
Got a story? Email news@theconstructionindex.co.uk