Currently there is no way to skip selecting a nationality, hence the only way to cover it is by lying.
By covering it "appropriately" you're suggesting they should lie something that is believable.
If someone can fake a good British accent with fluent English, you can be fooled that you got what you wanted.
There is nothing wrong with wanting a verified English escort, but if you decide to go with someone unverified, you should expect that it's not gonna be true.