J. W. Walker & Sons Ltd is a British firm of organ builders established in 1828 by Joseph William Walker in London. Walker organs were popular additions to churches during the Gothic Revival era of church building and restoration in Victorian Britain, and instruments built by Walker are found in many churches around the UK and in other countries. The firm continues to build organs today.

Liverpool Metropolitan Cathedral, officially known as the Metropolitan Cathedral of Christ the King and locally nicknamed "Paddy's Wigwam", is the seat of the Archbishop of Liverpool and the mother church of the Roman Catholic Archdiocese of Liverpool in Liverpool, England. The Grade II* Metropolitan Cathedral is one of Liverpool's many listed buildings.