I have lost the serial number on the two WEM3080 Meters I have just installed. Is there a serial number on the body of the meters. Any help would be most appreciated??

Hi:

Yes, the SN is also snapped on the shell of the device.

You can also refer the network device like this 

https://www.iammeter.com/quickstart/wem3080t-quickstart#9-how-to-know-that-the-meter-already-connected-to-your-router

and the SN would be displayed here