Hi dazednconfused,
I had the same problem. I tended to put Ibid. and op. cit. everywhere and my supervisor didn't like it. The options were either to rewrite the author's name, year and page number every time [e.g. Barth,(1986),18] or write: Barth as in note 46. I tend to use the first option, but it took some time to get used to it!
I hope it is of some help.