If you are unable to read the text on the plaque then here is a summary.

John, Paul and George plus John Lowe (piano) and
Colin Hanton (drums) paid Mr Phillips 17/6d to record
their first disc here on 14th July 1958
The two number were "That'll be the day" by
Buddy Holly and "In spite of all the danger" by
Paul McCartney & George Harrison.