Media mogul Sumner Redstone has reached agreement with his daughter, Shari, to put some of National Amusement’s 1,500 cinemas on the block rather than the entire division, as part of debt-restructuring discussions to avoid selling more shares of Viacom and CBS, according to people familiar with the matter.

If lenders agree, the plan would clear the way to sell a part of the US group and 19 theatres in the UK. A prospectus is not expected to be released until early January, one person familiar with the discussions said.