[Q] Mirroring help topic

Hello,
Hope you guys can help?
I have just got a Panasonic Veira TX-40AS640B and I have a nexus 6.
The TV has a mirroring function on it but cast screen does not pick the TV up.

Am I missing an app or do I need to use chromcast or similar??

The message on the TV reads:

Viera_txas640b_dc1b

Input devices such as a smartphone or PC display the screen to viera.
Please select viera as a output device after wireless connect mode is started by input device.
Please refer to instruction of input device such as method of connection

Waiting connection from input device

Any help appreciated