A friend has persevered with the M&S chat function and got this response:
"We, ourselves haven't named this drink, it is already a very popular cocktail and we've had a lot of contact from customers asking for us to stock it. At the moment, we have no plans to remove this particular product. However, I do appreciate your feedback and will be happy to pass on your comments to our teams behind this drink."
Which sounds like a prepared answer
Would a rose by any other name smell so sweet? Would a cocktail with a non-rape culture name taste so good? How could we ever find out?