The record-breaking number of TV viewers that watched last weekend's "Concert for Diana," have boosted U.K. music sales this week.

According to official TV ratings, a staggering peak of 14.8 million viewers tuned in to watch BBC coverage of the July 1 event, held at London's Wembley Stadium.

Featuring headlining hit makers including Elton John, Lily Allen, Tom Jones, Take That and Rod Stewart, the coverage amassed a 60% share of the U.K. TV audience at its peak at 10.15pm.

And many of the participating music stars have also benefited at retail.

Based on sales figures from the Sunday (July 1) to today (July 4), Lily Allen is likely to see her "Alright, Still" (Regal) set re-enter the Top 20 of the Official U.K. Albums Chart, up from No. 46 last week.

Former boy band Take That is expecting a double whammy. Current album "Beautiful World" (Polydor) should jump into the Top 20, up from No. 40 last week, while the act's greatest hits album "Never Forget - The Ultimate Collection" (RCA) is expected to enter the Top 5, after taking the No. 10 slot last week.

Singer-songwriter James Morrison also profited. His "Undiscovered" (Polydor), at No. 66 last week, looks set to break the Top 30 this week.

Even catalog material found a new lease of life. Elton John's "Rocket Man - The Definitive Hits" (Mercury) looks set to leap from No. 100 into the Top 30.

"Everyone who took part has seen a big lift," says a spokesperson for retail giant HMV.

"Concert for Diana is designed to engage mainstream audiences that would not typically go and watch some of these bands," the spokesperson notes. "The Feeling, for example, were playing before a brand new audience."

In comparison, the Live 8 charity concert on July 2, 2005, pulled in just 9.6 million viewers at its peak. Meanwhile, the BBC's coverage of this year's Glastonbury Festival (June 22-24) generally attracted single channel viewing figures below the 2 million mark, although coverage was available simultaneously on multiple digital channels.

The concert was organized by Princes William and Harry, the princess' sons, to commemorate the 10th anniversary of her tragic death in Paris.

Retailers will be hoping for a similar boost from the BBC broadcast of this weekend's Live Earth concert, also being staged at Wembley Stadium.