Coincidence?
Chris Grayling appointed Justice Secretary in 2012
First job is to be involved in a "Prison benchmarking programme" where staff were reduced from about 23,000 in 2012 to about 18,000 in 2015
After a Prison enquiry it was decdided savings and staffing shortages had made "a significant contribution to the deterioration and safety" in prisons.
Carillion awarded Prison contract in 2015
Grayling gets a sideways move in 2015
Grayling then lands the Transport Secretary's job in July 2016
Carillion awared HS2 contract in July 2017
Like i say, coincidence?