The decision taken prior the elections last was, as you have said, compliant with your then grant policy which has subsequently changed so no court would uphold a retrospective change to the resolutions validly passed at the time unless there was something in the terms and conditions of the offer which implied reimbursement in certain circumstances. For my own council any grant is offered with a clause which states that the parish council has the right to require a repayment if the project which is funded is delivered at substantially less than originally anticipated. We've never invoked that clause but reserve the right to do so and this is clearly stated within the offer letter. You need to look at the grant terms which applied when the original decision was made.