She's a very attractive girl, no doubt about that, but having seen that duplicate profile it's fairly clear she's a student doing it for some fast easy cash on the side. Thinking about it logically a girl that attractive wishing to make serious money would be working out of the West End, not out in the suburbs.
I also believe she sometime works out of a flat near Canary Wharf.
The fact she's 22 in the other profile means she's using the "just 18" label as a cheeky marketing ploy".
In summary, I'm not saying outright avoid, but it'd need a lot of further very positive reviews to tempt me back.