Wiring advice for replacing BDR91 with Hive single channel receiver - Vaillant ecoTEC pro 28

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Hi All

I've just received my new Hive in the post today. I was hopeful that I'd be able to just swap the fronts from the BDR91 and the Hive receiver but (of course) life is never that simple! :(

I've had a good look through the forums and I can't see any advice that specifically relates to my combination of boiler (Vaillant ecoTEC pro 28) and BDR91 that I can copy - so, I'd be really grateful if someone could help me out with the wiring. I've attached photos to illustrate what wiring is currently in place.

Any help very gratefully received.

Cheers!
 

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L&N FROM BDR to L&N on hive single channel

Link from L to 1 on hive
Wire in B on BDR to 3 on Hive simple as that
 
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