Tado V3+ with Smart TRV's used with Tado V2 - are they compatible?

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I am looking to upgrade my Tado V2 extension kit to the V3+ version, but I have a load of smart TRV's that I use with my current V2 extension kit.

Would these TRV's be compatible with V3+ or do I need to buy new ones?

Thanks in advance.

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