Sophos SG135 WAN side firewall configuration

I have revisited my firewall configuration and have a problem. I have found that the destination for internet bound traffic on a subnet had been set to all rather than WAN. This didn't look right so...
Sophos SG135 WAN side firewall configuration new problem creating a Vlan interface

I have a few subnets and have been trying to bring some discipline to my firewall configuration. Because the system is live I am trying to create a new interface Test_Network on a VALN using my private...