In addition, Ward said that the company was keen to look at long-term benefits when making the business case for the cloud migration project.

"When you are looking at something like this you have to take a long-term view. If you take any given year, where you look at the infrastructure that you have already got, you have a sunk cost because of the capital investment, the licences, the staff that manage that infrastructure etc.," said Ward.

"Take all of that and move it to AWS in year one, and it is going to cost you - there are set-up costs, migration costs, depreciation costs. However, if you take a five-year view, and consider a hardware refresh in that five-year period, you can make a saving."

He added: "In year one and two we worked out we won't see any significant return on investment. After two and a half years, that's when we really start to see the benefits. If you also include non-tangible figures, such as staff efficiency, we are looking at about a 40 percent saving over the five years."