Okay, I managed to sort this out myself:
I was following this tutorial https://github.com/lukeorland/neo4django-tutorial (which massively helped - so a big thanks to Luke Orland for taking the time to put it together), which used the dev release of neo4django.
After delving into the source code a little further, I realised the code was very different to that found here: https://github.com/scholrly/neo4django.
Substituting the latest neo4django files for those of the dev release solved the problem!