Agree, who wants to find out
For £250, not me.
The fee in advance is BS, it's just not industry standard, she can see other girls profiles so she must know that. You'd never see that money again. No reasonable SP would ask a punter to take such a stupid risk. It's no different to a punter asking for sex upfront and promising to pay a few days later - nobody wanting to be taken seriously asks for that.
The only thing that puts doubt in my mind is the clear face photo with verified date. Scammers don't usually do that. That must be the person behind the profile, or at least, someone involved with the profile. Doesn't mean she's not a scammer, mind, but normally you'd expect stolen photos or body shots which can't really be used for identification.
I agree that all services on offer is typical for a scam. Then again, she says she's got "no limits". If it was a model looking girl I wouldn't believe her, but to be fair she looks like a dyke. So not sure what to make of that.
If anybody is going to try and arrange an incall - and knowing UKP, some crazy adrenaline junkie probably will - there is always the risk of a setup/mugging, so proceed with massive caution.