On appeal before me, counsel for the appellants, Mr Damodara, submits that the DJ failed to place sufficient weight to the evidence of P’s relationship with the appellants and the respondent. Second, the DJ erred in elevating the opinions of the certificate issuer to that of a presumption. The DJ should have been slow to accept Dr Kua’s evidence, and Dr Nagaendran’s evidence should be accorded more weight as he had been P’s doctor for almost five years. Third, the DJ erred in applying an extremely broad-brush approach in construing P’s mental capacity, and it cannot be said that P could understand, retain, use/weigh information and communicate her views on the various aspects involved in a decision to execute an LPA. The DJ should also have taken into account Dr Nagaendran’s assessment of P’s mental capacity in relation to her Home Protection Scheme (“HPS”) claim, and evidence of past behaviour, such as the respondent’s position that P needed a litigation representative in November 2015. Finally, the respondent had failed to act in P’s best interests by refusing to allow the appellants to visit her. In his further submissions in April and June 2021, Mr Damodara submits that Dr Kua’s evidence cannot be relied on as he did not comply with the Singapore Medical Council Ethical Code and Ethical Guidelines 2016 (“Guidelines”) and the MCA Code of Practice. I consider this more fully at [37] below.