Legendary rock band Led Zeppelin has had few concerts and in between in recent years; tonight’s gig at the O2 Arena in London is the first reuniting Robert Plant, Jimmy Page and John Paul Jones since the late 1980s.

The concert was originally scheduled for Nov. 26 but Jimmy Page suffered a fracture to one of his fingers last month and due to a necessary three-week convalescence period the show was postponed to De. 10.

Tonight’s event is a tribute show for Atlantic Records founder Ahmet Ertegun, who passed away in December 2006, aged 83. Ertegun signed Zeppelin almost 40 years ago, in 1968.

Other acts signed to perform Monday night are Bill Wyman’s Rhythm Kings, Pete Townshend, Paolo Nutini and Foreigner. The event was announced in September by promoter Harvey Goldsmith.

All proceeds will go to the Ahmet Ertegun Education Fund.

Plant, Page Jones and Jason Bonham, the son of original Led Zeppelin drummer John Bonham, who passed away in 1980, will rock for nearly 20,000 fans tonight at London’s O2 Arena.

At least two questions have been popping up regularly regarding the reunion. Firstly, is this a debut for the veteran rockers announcing a string of future concerts? Secondly, are they still as magnificent as they were at the height of their career?

Led Zeppelin disbanded in 1980, after the premature death of Bonham. Their reunions since then have been very rare. In 1985, Page, Plant and John Paul Jones took the stage together for Live Aid, with Phil Collins and Tony Thompson on drum duties.

They played together again three years later, in 1988, when they were also joined by Jason Bonham and played at a 40th-anniversary show for Atlantic Records.

In 1994, Plant and Page reunited for an MTV Unplugged performance that resulted in a world tour and an album.

When asked about plans for additional gigs, Plant and Page have been quite coy, dodging questions and leaving room for interpretation. “Let's just do the O2 and we'll see what happens from there,” Page told Reuters in an interview. “I haven't got a crystal ball here and nor have you.”

So the first question can be answered either positively or negatively but hopefuls still have a chance to dream about more upcoming concerts.

As to the second query, the living legends, who together with the late Bonham have sold 300 million albums worldwide, were apparently so pleased with rehearsals for the tribute concert that they decided to perform a whole set.

Upon announcing their reunion, concert promoter Harvey Goldsmith said he had initially asked them for a 30-minute set.

“Jason Bonham became part of the catalyst, and they did a week's rehearsal,” he said. “We had a meeting and Robert turned around and said we're not going to do 30 minutes, we're doing to do a whole set.”

This sounds encouraging enough to expect an excellent comeback from the band. However, it is not difficult to imagine that loyal fans would be willing to overlook possible flaws during tonight’s performance.

Considering the lengths some fans have gone to in order to acquire tickets – such as one man spending some $170,000 during a charity auction and people lined up at the venue days before the concert, tonight’s show is very probable to make many people happy and to receive rave reviews – at least for its historical significance.