A friend graduated with a Bachelors degree last year and then a Masters degree this year. Which is recorded first after their name ie.
Joe Bloggs BEng MSc or Joe Bloggs MSc BEng?
The B before the M IMO but you can also just have MSc on its own as that implies you have a Bachelors already anyway (unless you went to Oxbridge - do they still do that?)
I agree with Prudie.
You qualifying degree first followed by your post graduate degree OR just use your post graduate degree omitting your qualifying degree.