What has become known as the Regal Shake refers to adding a freshly cut broad strip (a swath) of citrus zest into the shaker along with the ice and other...
I find it curious that this revived technique is repeatedly credited to 2010, when we were using it fairly liberally - including variations such as stir or shake with slices - at M&H London at least as far back as 2006, perhaps further.
I found this article when making a Chanler, which was superb, however the recipe calls for a royal stir with a lemon swath (after expressing oils into the glass). I don’t think it would be as good with a lime swath, but you never know…cheers!