LONDON (AP) _ Paul McCartney gave a free rooftop concert to startled passers-by, reviving memories of The Beatles' final concert in 1969.

McCartney _ who was recently knighted _ performed for 20 minutes Friday during the filming of a documentary about his new album on the rooftop of a building he owns in Soho Square in central London.

``There were quite a few people gathered below listening to him playing live on his guitar,'' his agent Geoff Baker said. ``There was amplification so people down below could hear him.''

``Several of them were rather mystified but Paul really enjoyed himself. It certainly brought back memories for him,'' he said.

The Beatles brought traffic to a standstill during their final appearance in 1969 when then played their hit ``Let It Be'' from the roof of the Apple Record building in Saville Row.

Baker said McCartney played two songs on Friday, ``Young Boy'' and ``The World Tonight,'' which are due to be released in the next few weeks in Britain and the United States. The documentary is scheduled to be shown on Britain's Independent Television on May 18.