Some useful advice from a scientific Parliamentary committee. It has always been the case that the guidelines for safer drinking recommended having alcohol-free days during the week and Scotland already have this as part of their official guidelines.
The two alcohol-free days gives the liver a rest from having to metabolise alcohol and is a protection against developing physical dependence on alcohol. The peak effects of withdrawal symptoms from alcohol in a dependent drinker occur about 48 hours after the last drink, and these can be life-threatening in some cases. If you set this as a target but are unable to keep to it, then this in itself might be a warning that alcohol has assumed a greater importance in your life than you perhaps realised.