My accountant wants to try and claim for R&D Tax Credits.
Unless your accountants have full-time engineers with experience in preparing R&D claims, you will most likely under claim and lose significant amounts of tax credit benefits.
This program is first driven by engineering then supported by accounting. Engineering experience and competence is what determines whether a project or job can qualify under the definition of Research and Development. Once the project satisfies the requirements and is qualified, only then can costs be submitted.