I've worked in a call centre where I used to get passed the calls from people accents no one could understand. I've lived all over and have Scottish, Welsh, Irish, and loads of other ascents in my family.
Her call would 100% not have been passed to me. It's bloody close to RP and very clear.
Now, I have had conversations with people from NI, Scotland and the NW which southerners did struggle with. But not her!