Typically, unresearched, but with another of their favourite FM pics, from the Herald’s David Bol, £25 million over 5 years, is a drop in the ocean.
From the FT in October 2021:
The value of contracts awarded by the UK government and public bodies to consultants more than doubled to £2.5bn in 2020-21, as extensive use of the private sector was made in response to the coronavirus crisis, according to new research. The Big Four professional services firms — Deloitte, EY, KPMG and PwC — were awarded contracts worth £1.2bn on a combined basis in the year to March 2021, according to analysis by data provider Tussell.https://www.ft.com/content/efdcaccf-a535-4ae8-afd0-8d0d70b1ed4b
So 12 times the population but 500 times the spend, 41 times pro rata.