The report claims that it would be in the interests of the rest of the UK - to promote trade, competitiveness and financial stability - that there should be co-operation on jointly managing the sterling currency and other policies on finance.
The investigation, known as Operation Loft, was conducted jointly with the Republic's Office of the Revenue Commissioners and Her Majesty's Revenue and Customs (HMRC).
For example, an operation where Serco and the existing state-run London Probation Trust jointly provide Community Payback services for the MoJ took around two years to procure.