Changing Honeywell BDR91 to hive single channel

[Denver1991]

Hi all,
Some advice needed I currently have hive single channel connected to my combi boiler. Current boiler didn’t have any thermostat to begin with so was easily wired in.
I’m moving house and the current set up is a Honeywell BDR91.

Advice on the wiring below
Blue to hive negative
Brown to hive live
Grey to common
Black to 3 (heating on)
Thoughts?

 

[RandomGrinch]

Blue to hive negative (*neutral)
Brown to hive live
Grey to common
Black to 3 (heating on)

+ Green/Yellow to Hives earth terminal.

 

[Denver1991]

Thank you,
Forever saying negative instead of neutral.