Private investor Rcapital is to acquire GT Emissions Systems, a UK supplier of emission control systems for diesel engines in commercial vehicles and equipment, and a subsidiary of braking systems, rail and commercial vehicle systems manufacturer Knorr-Bremse.

Middle-market private equity firm Aurora Capital Partners has acquired GenServe, a provider of backup power for commercial, industrial and critical infrastructure. Terms of the transaction have not been disclosed.

Three Hills, a provider of “preferred capital” to the European middle market, has closed its investment in audiovisual production services company TwentyFour Seven Group, which will facilitate a management buyout and further international expansion via M&A.

Private equity and infrastructure investment manager Foresight Group has completed a £4.45m investment into DP Medical Systems, a UK distributor of medical equipment and consumables.

UK-based mid-market private equity investor Livingbridge has exited its investemnt in Habit Health through a sale to Five V Capital, marking the sixth exit for its 2016 vintage fund, Livingbridge 6.

BrightNight, a renewable power company serving utility, commercial and industrial customers, has secured a $440m investment from the infrastructure business at Goldman Sachs Alternatives.

Mid-market private equity investor Equistone Partners Europe has made an investment in QuestGates, a UK provider of loss adjusting and claims services.