The Evidence Act 1872 was replaced by the BSA 2023 (in force 2024-07-01); no verified section mapping on file for Section 109 — confirm the corresponding provision (savings: Section 170, BSA 2023).
When the question is whether persons are partners, landlord and tenant, or principal and agent, and it has been shown that they have been acting as such, the burden of proving that they do not stand, or have ceased to stand, to each other in those relationships respectively, is on the person who affirms it.