Best wishes to you both. I hope the outcome is good.
As lots of people have said, you need to see what the specialist opinion is and go from there.
The clinic should ask your wife if she wants a copy of the clinic letter that the specialist will write to your GP. It is her right to have one so ask if they don't ask you, and even if some of the terms are not familiar to you, it is a good way of having a summary of all that is said to go back over later.
In addition, Neuro units often have specialist nurses whose job it is to make sure you both understand what is going on, although I don't know if this is the case in Oxford.