Replacing Drayton Wireless Thermostat with Google Nest

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I am looking to replace my wireless Drayton thermostat with a Google Nest, however comparing the wiring of the Drayton shown in the pic, it's not clear exactly how I would connect the Google Nest.

I haven't managed to find anything on line with tells me what each connection on the Drayton is and the corresponding connection on the Nest.

Any help would be appreciated.
 

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Looking that, possibly an industry standard backplate which may accept the hive. Going left to right x2 neutrals (blue) a live (Brown), linked live to common (small brown), another live, 2 empty, 3 heating on, 4 empty, X2 Earths in the earth terminal. If need be, transfer wiring across.
 
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Thanks for that. The Nest instructions say "Connect the heating control circuit to the Heat Link 1 (normally closed/satisfied), 2 (common), 3 (normally open/call-for-heat) as needed."

Am I right in thinking that apart from the obvious live and neutral connections, the 2nd live wire goes to 1 and the heating on wire to 3 on the Nest? Do I still need the linked live to common?

Many thanks.
 
Apologies, I assumed Hive for some reason. The obvious L and N yes, then looking like it you still need a link between live and common, and your number 3 on Drayton goes to normally open.
 
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Great thanks, so effectively the only change is connecting the link into terminal 2 on the Nest rather than it sharing with the 2nd live on terminal 1.

Thanks once again.
 
Great thanks, so effectively the only change is connecting the link into terminal 2 on the Nest rather than it sharing with the 2nd live on terminal.

Yes it seems that way.
 

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