Thomson V8 Router (settings access?)

Have bought a Thomson V8 router second hand off Ebay and obviously need to log into it to enter my ISP account details etc. The previous owner tells me that it should be still set to default login but does not know what it is. Can anyone tell me the default login for this router?
Any help or advice would be much appreciated.

Try Administrator for UID and pwd of either MAC or Serial No.

Thanks for that. Did eventually get into setting by useing the serial number. Entered the new account details etc and left the passwrd as default ( S No.) and saved the setting. Half way throught the saving sequence I was asked to enter password which I did but it would not accept the default so I am now locked out again.

Any ideas. Is there a way of forced reset etc?!

There will be a factory reset method - a small hole and button, but the exact sequence I don't know. The PWD was just from memory of using one once.

DO a quick Google for Thomson V8 factory reset ...