A swathe of well-known Christmas hits from past holidays, including favorites by Wham!, Wizzard and Shakin' Stevens, looks set to enter the U.K. top 40 this Sunday, as the first Yuletide nears in which download-only sales are computed by the Official U.K. Charts Company.

Mariah Carey's No. 2 U.K. hit of 1994, "All I Want For Christmas Is You" (Columbia), is on course to re-enter the top ten on download sales.

"Midweek" data from the OCC also has "Fairytale of New York" (Warner Bros.), the 1987 original by the Pogues featuring Kirsty MacColl, back in the top 20. The track re-entered the chart this week at No. 33, making it a top 40 hit for the fifth time, and third year in a row.

Veteran American crooner Andy Williams, who turned 80 on Monday, is set for a return to the top 30 with "It's the Most Wonderful Time of the Year" (Sony BMG), fuelled by its use by U.K. retailer Marks & Spencer in its current high-profile TV campaign.

Carey's track stood at No. 4 on iTunes' top songs chart on Friday afternoon U.K. time, and the company's director of worldwide programming Alex Luke tells Billboard.biz: "There are significant jumps in the sales of Christmas classics and new holiday recordings each year. With the demand, we go to great lengths to make sure it's discoverable by adding a holiday genre to the iTunes store and ramping programming initiatives like iTunes Essentials. It's absolutely reflected in the titles hitting our charts."

Several other festive recurrents are reaping the more general benefit of exposure on British radio and via repeated in-store high street plays. "Last Christmas" (Epic) by Wham!, a top ten hit in both 1984 and 1985, is due to return to the top 30. Wizzard's "I Wish It Could Be Christmas Everyday" (EMI), No. 4 in 1973 and a top 30 hit in adapted versions in 1984 and 2000, is also heading back to the top 30, while Shakin' Stevens' 1985 Christmas chart-topper "Merry Christmas Everyone" (Sony Music) is due in the top 40.

Steve Davis, director of EMI Catalog and EMI Liberty, says the download-only element to the singles chart means that the survey "is turning into a good barometer of how popular single tracks really are, rather than a way of showing how effective a company can be at marketing particular formats to identified groups of consumers at specific times."