Marston's, the brewer and pub operator, has put 280 bottom-end pubs up for sale, according to MA's sister publication M&C Report.
It is thought that PricewaterhouseCoopers has been given the mandate to oversee the disposal.
The pubs, which are thought to be worth between £50m and £70m, are likely to attract interest from Admiral Taverns, InnDeed and London Town, as well as from private equity groups.
Most of the properties in the package are currently operated as leased pubs.
Marston's indicated at the start of the year that it would be selling £50m of pubs during 2007.
Marston's declined to make any comment on the 280-strong package.