There’s a man out there, ehum, who possesses a posh British accent — but it is all literally a facade. According to reports, royal wedding expert Thomas J. Mace-Archer-Mills is indeed actually from Upstate New York. Despite, uh, his undeniably posh accent that has him sounding like he’s from the suburbs of London.
Turns out, the Wall Street Journal was the first to out him as an ordinary American despite his trove of informational booklets and the like on the royal family. 10 days after the wedding of Meghan Markle and Prince Harry,  Thomas, was found to be American rather than British. But, surprise surprise, it was never a lie to begin with.
Per Thomas, he never actually claimed to be born from Britain.  The Journal noted that he is actually from a small town in upstate New York, and, “proudly owns it”.