Install / New Product Query

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Hi All, about to buy and then install Tado at home.

I need a V3 wireless including hot water starter kit and a wired add smart thermostat -- about £320 in the UK from Tado website.

Screwfix offer what looks to be the same at almost half the price. Anyone know if these are one of the same product / version -- i.e. I am comparing apples with apples.

https://www.screwfix.com/p/tado-smart-wired-heating-thermostat/983ht


Anything else of significance I should consider please?