I've been looking for a good "holiday-time" candidate for this new bottle of Hayman's Sloe Gin and I think I found it. Adding sloe gin as a fourth ingredient in an equal-parts Negroni recipe would only make the Negroni sweeter and heavier, so emphasizing the London dry and lightening the vermouth like this is a smart approach to take. The Hayman's Sloe Gin is particularly nice, and I went with Martini & Rossi Riserva Speciale Bitter to avoid overpowering it with Campari. Lacking a true "rosato vermouth" (of which there don't seem to be very many), I used Ramazzotti Aperitivo Rosato which does a good job of lightening things up. A superior Negroni; 5 stars.