So against my better judgment I'm going to wade into this thread and give a personal opinion which isn't partisan. Both
brogdale and
Spymaster seemed to agree (before the aside on whether or not consumers are complicit) that management forcing people to sell beer towers to people who should've been refused alcohol isn't that bad.
Serving someone who's drunk is a crime under the Licensing Act but it's very rare to be prosecuted for that alone instead of in combination with other more serious offences. Instead, it's better to look at things from a licensing objective standpoint, focusing on the duties of any licensee to prevent crime, disorder, and public nuisance, and the parallel duty to protect public safety. The key thing is that where people are exhibiting clear signs of excessive drunkenness they are refused service clearly and compassionately, and that management train and empower staff to make these refusals.
Management overruling employees in this area without good reason creates an unsafe work environment and an unsafe environment for other customers who are drinking more sensibly. As someone who manages a licensed premises in London (post-pandemic career change from legal academia) I expect people to try and buy drinks when they're too drunk, and I also expect people to try and buy drinks for their friends who are too drunk. Refusing them (as long as it's done properly) almost never causes issues. Giving them that extra drink is the root cause of most issues that licensed premises face, from fighting to abuse of staff. Management creating an environment where staff are forced to second guess their intuition in these situations is just as dangerous as a poorly maintained cellar or an over-capacity venue.