@David-TP 

Hi David, thank you for your quick response, appreciated.

yes, main deco is red constantly.  The others just flash red. 
deco app stated (everything looks good)

and I have no issue with the any connections.  
 

I want the light to be turned off, however red is on even when LED setting is off.

I have BT full fibre with the super hub 2

i have no DNS filtering that I can seen on my main router settings 

no other security than the standard firewall either

the only setting I can see is dynamic DNS where in the router settings state

To use a dynamic domain name system (DNS) service, you'll first need to register with a service provider. The service provider will send you the information that you'll need to set up your Hub (including your service username, password and host name)

do I need to set something up for deco to work correctly 

thank you

sy

  @David-TP 

Hi again

just an update of a possible fix

I have copied the DNS address from my main ISP router and entered it in the deco app IPv4 primary and secondary DNS

the light has gone out for now and hopefully for good. If this has fixed my problem, thank you for pointing me in the right direction with the DNS.

hopefully this may help others also 

cheers Sy