Preparation for luxury vinyl planks in bathroom. Should I tank?

[Babboo]

Hello,

I’m a keen diy’er and looking to install my bathroom. I intend to tank the wall areas where my shower will go with q-boards from b&q before tiling.

My floor however is luxury vinyl plank which is supposedly waterproof. Has anyone got experience using this in a bathroom? How do you prepare the floor and seal the wall to floor join? I was thinking I’d tank the whole floor area to ensure no leaks around the edges of the room, or indeed though the planks.

Any advice would be greatly appreciated