Pub operator JD Wetherspoon is introducing tough new anti-binge-drinking measures following the Government's crackdown earlier this month.
The group last week announced a number of steps intended to discourage binge-drinking and said it would remove financial incentives to "trade up" to large quantities of alcohol.
Two-for-one drinks promotions will be banned, as will any price incentives to buy double shots of spirits instead of singles.
The pub operator will also reduce the price of mineral water and certain soft drinks, while the number of units of alcohol contained in jugs of cocktails will be reduced from six to four.
New chief executive John Hutson said: "There is obvious concern among licensing and police authorities, as well as the Government, about attitudes towards alcohol in the community as a whole."
Hutson said that he did not expect any financial repercussions after the new policies had been established. He denied the new moves followed recent problems with antisocial behaviour at one of its Wetherspoon's Lloyds bars in Glasgow.
Late-night bar operator Regent Inns said it would not be introducing any new measures to combat binge-drinking in brands such as Walkabout and Jongleurs. A spokesman confirmed that price promotions during off-peak periods of the week would continue.
Enterprise Inns, also a member of the Portman Group, said it would abide by the group's guidelines but declined to comment further.
Source: Caterer & Hotelkeeper magazine, 25 - 31 March 2004