No shade to Exeter, but I feel like Oxbridge will be well aware of which universities tend to be more generous with their marks compared to others.
Also, as someone else mentioned, her tendency to write long rambling sentences which actually contain no relevant information and mean nothing will become blindingly obvious when submitting writing samples. I can think of one now, but that doesn't mean I deserve a literary prize: "The style of writing is reminiscent of many previous authors who conveyed feelings related to the concept of childhood, in that childhood is a way of reflecting abstractedly with the past." Lots of words, literally no content.