XG125 - Unable to remove physical and virtual interfaces from a bridge

Could do with a little help in recovering both my physical port 5 and virtual interface from a bridge that’s no longer responding to any configuration options. Initially the intension was to bring together DLAN devices over the physical port and those connecting through the Sophos wireless interface together via a bridge.

After a time this was no longer required so I wanted to dismantle the bridge and use the physical port and the wireless for other things. When I go to delete the individual interfaces to the bridge, there’s no option to delete (tried other browsers to ensure it’s not a problem with Safari),

There’s only the delete option on the bridge itself which if selected says the interface has successfully been deleted.

However on refresh of the interface screen it’s still there as before.

If I go to the bridge interface itself to have a look at its configuration, the configuration page just hangs:

The details in the individual interfaces are minimal with no scope to edit:

If I try and create a new wireless interface, it complains that the AP LocalWifi0 could not be modified, therefore I can’t currently re-use the Wifi functionality on the XG125.

I can’t delete the original wireless network as it belongs to a bridge interface.

Any ideas on how I can recover both my wifi and Port 5 devices would be greatly appreciated.