I think I’m seeing this on my new hub (the one which came with the V6 TV box) and the hub is in modem mode. This may be paranoia (I could ‘just’ have a virus) but since upgrading I now see random phones come and go on my Windows home network. See image here: https://twitter.com/Fulby/status/987796047027154944
If this is the hub it’s appalling coding and appalling behaviour from Virgin. How bad is the security if these phones are appearing on my private home network.