The Common Agricultural Policy (CAP) Delivery Programme was a combined effort between the Department for Environment, Food and Rural Affairs, the Rural Payments Agency, Government Digital Service and other bodies to develop new systems and processes to support the implementation of the CAP in England. It was established in 2012 to address failings in how it was previously delivered and to adapt to the increased complexity of the new CAP.
More information on the programme costs and benefits can be found at: https://www.parliament.uk/business/committees/committees-a-z/commons-select/public-accounts-committee/inquiries/parliament-2015/early-review-of-cap-delivery-programme-15-16/
The Programme for England was formally closed in March 2017 at a cost of £216 million. Since programme closure it has cost circa £3m per year to make year on year improvements to the system such as making it available online and on-going maintenance and support.
Costs incurred in other regions is a Devolved issue.