Shake Tuaca and lime juice, pour over rocks, add Ginger beer and float Angostura on top.
Curator's note: The recipe has varied some over time depending on the source. A 2003 article says "ginger ale" was used, but later articles say ginger beer. I have updated the entry as generic ginger beer (rather than Goslings).
Per Sammy Berry in an Argus article from 2005: "We developed it when we were in the St James because people kept wanting to buy us a drink and we were getting a bit sick of straight Tuaca."
It is not clear if this refers to the period when she and her boyfriend Poul Jensen operated the pub (from ~1996 to 1999) or some later time.
https://www.theargus.co.uk/news/6731459.bet-brought-us-britains-trendie… 2003 article about Tuaca and mention of the Tuscan mule.
https://www.timeout.com/uk/nightlife/tuaca-italian-liquor-brighton
Curated to add history, creator, 2003 or earlier creation date, and location. The original may have used ginger ale rather than ginger beer, and Angostura is typically not associated with Sammy Berry's version, but I have left this in because it all works and I am leaving the listing as an "altered recipe" due to the uncertainties.