Barley Studio

A York-based stained glass studio founded in 1973, specialising in the conservation and restoration of historic stained glass and leaded lights for cathedrals and churches across the UK.

Donald Insall Associates

One of the UK's most eminent conservation architecture practices, founded in 1958, working on the country's most significant historic buildings — from Westminster Hall and Blenheim Palace to Chester Cathedral and Wentworth Woodhouse.

GNR Roofing Services

York-based heritage roofing specialists since 1981 — one of only 33 NFRC Heritage Roof Masters across the UK and Ireland, working on Grade I and II* listed buildings, scheduled monuments, ecclesiastical properties, and country houses across Yorkshire.

Heritage Conservation Restoration Ltd

North West-based specialists in stonemasonry, leadwork and roofing for historic and ecclesiastical buildings, with major restoration projects completed at Manchester Cathedral and Blackburn Cathedral.

Purcell (York Studio)

One of the UK's leading conservation architecture and heritage consultancy practices, with a dedicated studio in York serving the North East and Yorkshire. Working on some of the region's greatest buildings — including Durham Cathedral, Newcastle Cathedral, and Auckland Castle.