Bridge Mode on Smart Hub

[GloriousAid]

Hi, 

Just got a BT Smart Hub and I need to set it to bridged mode so I can use my Google Wifi points as a mesh network. I found the correct page which can be seen below but when I try to save the settings with bridge mode enabled it errors which can be seen below the first image. Any ideas how I can get this to work? Many thanks! 

[licquorice]

Is that a business hub? The residential smart hub doesn't have a bridge mode.

[GloriousAid]

Not the business hub. Why doesn't the residential have bridge mode? That seems silly...