Reading the report carefully, it addresses the issue of daily allowances vs weekly allowances, and whether there is a protective effect for low alcohol consumption.
It does mention differing views from different people, such as when it addresses the levels for women, where it says:
"Aside from a minority, such as the Association of Small Direct Wine Merchants, who stated that "suggesting 2-3 units of alcohol a day for women or 3-4 alcohol units a day for men without reference to body size [...] is akin to having driving speed limits of 20-30 MPH for women or 30-40 MPH for men",[72] most of the written submissions we received did not challenge the advice that women should be advised to drink less than men, based on health risks. In fact, it appeared that even more evidence had emerged to support this since 1995. For example, Dr Morgan explained that "since the guidelines were last considered in 1995, [...] the major body of evidence has been on the detrimental effect of alcohol and the cancer risk, particularly for breast cancer in women".[73] However, Dr Harding suggested that as women "are exposed to the risk of cardio-vascular diseases" after the menopause, "the benefit that they gain from moderate consumption after the menopause would outweigh any increased risk of cancer".[74]"
Also:
"37. We have heard sufficient concerns from experts to suggest that a thorough review of the evidence on alcohol and health risks is due. The Department of Health and the devolved health departments should establish a nationwide working group to review the evidence base and use the findings of the review to provide advice on whether the guidelines should be changed. In the meantime, we consider that there does not appear to be sufficient evidence to justify increasing the current drinking guidelines."
I read it as a summary of evidence and opinions, including opposing views, concluding that the guidelines should not be changed based on the available evidence.
So, I am feeling very stupid for missing the contradictions and please do point them out to me.