pension contribution

I do not have the Kaplan text to which you refer, but I would suggest you read and work the examples in the OT course notes - chapter 10 Types of pension scheme and chapter 2 payments to charities under the gift aid system explains that personal pension contributions are treated in exactly the same way. Your question suggests that you have not understood and are not recognising in a question the difference in treatment of a personal pension scheme contribution as compared to an occupational pension scheme contribution.