Boiler Installation Power Supply Query

Hi everyone, I’m currently working on installing a Worcester Bosch Greenstar 42 CDI Classic boiler and have come across a question regarding the power supply for the Tado EU extension kit. From what I understand, there are a few key steps involved in the installation process, including wiring between Ls and Lr, disconnecting the onboard control, and setting up the appropriate communication protocols. However, I’m a bit unclear about the power supply aspect. Should the extension kit be powered directly from the boiler’s connections, or is it necessary to hardwire it to a 240v supply? I’ve read through some previous posts, but I’m still not entirely sure. Any insights or recommendations from the community would be greatly appreciated! Thanks in advance for your help.