Ring doorbell wired uk installation

Hi all, I'm intending to install a Ring doorbell wired. I currently have no doorbell system fitted at my house so this will be a clean install. I am getting slightly confused by the Ring lack of clarity and contradiction in their instructions. I have bought the Video doorbell wired, DIN Rail Transformer for Wired Video Doorbells (2nd Generation), and a Pro Power Kit. I intend to run this off an already installed fused and switched junction box that currently feeds my outside light. I intend to take a spur off this with 2 core 1mm cable into the live and negative terminals on the transformer. I will then use Bell wire from the 24vdc terminals to the doorbell and incorporate the power kit in this feed. I also have the doorbell chime which will be plugged in to give audible back up to the doorbell being used. My problem is with Ring saying that the power kit is not required for this setup, yet in a chart on the website it says it is. Also, the website says the doorbell should be run off an AC transformer, but the DIN Rail Transformer for Wired Video Doorbells (2nd Generation) converts to 24vDC. Can anyone clarify this for me please. Thanks in advance.