The Durrow healthcare consultancy is a partnership run by Andy Black and Ruth Harrison which works mainly in the UK, Scandinavia and Australasia.
Black says "When I was a Whitehall official under Thatcher and Clarke I dedicated years to destroying NHS Estates and failed".
Durrow was later employed by Epsom and St Helier University Hospitals NHS Trust, whose chief executive, Samatha Jones, is related to her by marriage.
"[4] Durrow provided Dorset County Hospital NHS Foundation Trust with a temporary chief executive in 2009/10, Derek Smith, at a cost of more than £2,500 a day, plus almost £20,000 in expenses.
In response Durrow retorted: "The only thing I would say is millions of pounds have been spent by Labour on management consultants, so they are not adverse to that.