The advice here is sound….
My viva was tough but all in all they are marking you on your work to make sure its yours….. You of all people should know your thesis (as it takes so freaking long to write)so you shouldnt have anything to worry about. The external examiner even said that one of my chapters ‘was the dogs dinner’ but didnt suggest any corrections!
The single best piece of advice… dont bullshit. If you dont know – say it…..
Like above – if your supervisor is any good you wont get put forward for the viva unless you will pass. But a death in the family puts it all into perspective – my mother was rather ill and died 3 weeks after my viva.
Good luck and remember the viva is all about joining a club…. once the viva is over you will have the same qualifications as the examiners!