I have graduated three times from UK universities. First was a bachelors' degree, then a Masters' degree, then a PhD. The graduation robes associated with my PhD graduation are absolutely horrible. I am now a lecturer in a UK university and if I attend graduation ceremonies at this University (or others, I suppose), I am supposed to wear the academic robes from my highest degree, i.e. the horrible PhD ones.
So my question is this, is it considered acceptable to wear the robes from my 'lower' degrees at such occasions, or even the equivalent PhD robes from the university I now work at (much nicer!)?
Basically, can I get away with wearing the wrong robes to graduation ceremonies?