The Qatari Investment Authority has agreed to a deal to take control of one of the four companies from the Three Delta-advised funds through which it originally invested more than £3bn in four UK healthcare companies, according to people close to the situation.

As part of the deal, QIA agreed in late July to repay some of the Senad Group’s debt with Nomura and some was written off. However QIA has not been able to agree to a deal with creditors so far to any of the other three businesses following a rift with the Paul Taylor-led Three Delta in June.