Two zone set up for Potterton Promax SL boiler

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Hello.

I currently have two wired thermostats by Drayton. They're ancient, so I want them replaced.

The thermostats are on the first and second floor of my home.

My boiler is a Potterton Promax SL. I have a separate cylinder for hot water. I _don't think_ my boiler supports OpenTherm.

I want to replace my thermostats with Tado smart thermostats.

I have the following questions:

  • Which kit do I need to buy for multi floor heating?
  • I'm assuming wired theromstats as my existing ones are wired? but is there a benefit for wireless here?
  • Is this easy to install with a Potterton boiler? I'm average skills at DIY!

Any advice / guidance much appreciated. I've seen Tado is on discount at Screwfix at the moment so I'm tempted to buy