Stephen Rigden

Good but even better with dry vermouth in place of Lillet Blanc.

If you are lucky enough to be able to get hold of a high end creamy yoghurt made using micro filtration than substitute it for the cream and you'll be in for a treat. I used Snowville creamery's plain yoghurt with 6% fat.
https://www.snowvillecreamery.com/plain-yogurt

Oh my. This is a surprisingly complex and delightful cocktail. For this English ex-pat it brought back fond memories of English beer. All that and a great cocktail too.

Your comment on Obama's error isn't quite correct. It was Chief Justice Roberts who mangled the words and Obama followed suit. The look on Obama's face was priceless at the moment he realized that Robert’s had erred. Before his entry into politics, Obama was a lecturer in constitutional law at the University of Chicago Law School. Since the form of oath is a Constitutional requirement he retook it with the correct wording afterwards.
https://www.theguardian.com/world/2009/jan/23/barack-obama-oa