@ChrisJL_2005 It looks like you have found the culprit. Disable this in Synology NAS. Also, do you really need external access to your NAS? Because, if you don't, find UPnP setting in Deco app under...

ChrisJL_2005 wrote @Alexandre. thank you I am not sure if the Virgin Super hub will let me do as you say. I will give it a go. I have read elsewhere that there can be conflicts. @ChrisJL_2005 Virgin...

@CemCan Changing Deco mesh to run in Access Point may or may not fix the issue, but it is the recommended first step in dealing with issues of that kind. You should configure Deco mesh to run in AP...

@ChrisJL_2005 I would recommend not to ignore these messages from Virgin Media. I once got into similar situation with my ISP, they cut off my Internet without extra notice. It took me time and...

@RandomStranger I do have Deco mesh with M9 Plus, Satellite Decos hardwired through unmanaged switches. I have number of devices connected to Guest Network on Satellite Decos, so I know that at least...

@Mockev1z TP-Link Deco does not support EasyMesh. See TP-Link Deco Mesh vs EasyMesh vs OneMesh vs Omada Mesh What's the Difference?