Keep in mind their pint (568ml, per paper) is an imperial pint (19.2 fl oz) and not an American pint (16 fl oz).
So, in US terms, UK guidance is ~5 pints and US/men is ~8.5 pints. Not a huge difference in terms of point made, but mostly so the message doesn't get garbled over the pond.
Also, their "high strength beer" in the paper (5.2%) is pretty much normal for American lager, so don't get thrown off by the high strength bit.
> 1 unit contains 10 mL or 8 g of alcohol
> 14 units (UK guidance per week for men and women) is equivalent to 4 pints of high strength beer or 5 large glasses of 14% wine (see below)
> 24.5 units (US guidance for men) is equivalent to 7 pints of beer or 9 glasses of wine
So 4 pints of high strength beer is 14 "units". 5.2% is the value used, which I wouldn't consider a very high strength beer at all ;)