She also has a profile on Vivastreet with more photos & only £60 for 30 minutes. Her prices are low price for an English girl. I think you are right - too good to be true.
I don't believe she is an English girl and her profile doesn't claim to be, just says she is fluent in English, which I suspect is bollocks.
She looks Romanian, though her rate set-up of £80/£100 with no 15mins option is more Polish prossie structure.
I would be tempted to TOFTT but only if her half-hour rate was £60.