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.
Clarke Restoration
Specialist stone restoration and conservation contractor with over 30 years' experience working on some of Northern Ireland's most significant listed buildings — including Stormont Parliament Buildings, Clifton House Belfast, Bushmills Distillery, and St Macartan's Cathedral, Monaghan.
Croft Building and Conservation Ltd
One of the Midlands' leading specialists in the conservation and restoration of historic buildings, working on cathedrals, National Trust properties, Grade I listed houses, and industrial heritage since 2002.
Devlin Plummer Stained Glass
South Norfolk stained glass studio specialising in the conservation and restoration of historic windows, with experience across more than 500 churches, cathedrals and public buildings in Norfolk, across the UK, and in Europe.
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.
Historic Property Restoration Ltd
North East England's leading specialist heritage contractor, with over three decades of experience on Grade I and II* listed buildings, National Trust properties, cathedrals, scheduled monuments, and world heritage sites across the region.
Locker & Riley
Award-winning fibrous and lime plasterwork specialists based in Essex, restoring decorative ceilings, cornices and enrichments in some of the UK's most significant historic hotels, theatres and livery halls.
McAteer Restoration & Conservation Plastering
Fourth-generation family firm of stuccodores established in 1901, working in traditional lime plasterwork, decorative cornicing, and in-situ ornamental plasterwork across churches, historic houses, and public buildings throughout Ireland and Northern Ireland.
Midland Lime Plasterwork Ltd
Specialist lime plastering and rendering contractors with over 25 years' experience repairing historic and listed buildings across the Midlands, including work at Hampton Court Palace and Chatsworth House.
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.
Q. Bytheway Leadworking Contractors
West Midlands leadwork specialists established in 1982, carrying out lead roofing, flashings, ornamental casting, and the restoration of historic lead pipes and hopper heads for heritage buildings, churches, and listed properties across England, Scotland, and Wales.
Surrey Leaded Lights
Icon Accredited Conservation Studio specialising in the conservation, restoration and crafting of traditional leaded lights — from medieval painted glass to Arts and Crafts and Victorian windows across the South East.
Wells Cathedral Stonemasons Ltd
Established in 1984 to preserve the skilled workforce behind Wells Cathedral's restoration, now one of the UK's leading stonemasonry practices working on cathedrals, colleges, Grade I and II* listed buildings across England.