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.
CARRE Heritage
Lincolnshire-based heritage conservation specialists with over 40 years of experience in listed and historic building repair, working across brickwork, stonemasonry, lime plastering, joinery, and leadwork.
Cheshire Lime Ltd
Chester-based specialist in traditional lime mortars, lime plastering, lime rendering, and breathable insulation for listed and heritage buildings across the North West — offering on-site mortar analysis and custom hot-mixed lime mortars.
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.
Finlayson Roofing
Edinburgh-based heritage roofing specialists led by Scott Finlayson, with 20+ years' experience on Grade A and B listed buildings including Stirling Castle, Edinburgh Castle and Fettes College.
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.
Hicks Plastering
Specialists in traditional Scottish lime harling, lime plastering and ornamental plasterwork, based in Moray and working on heritage buildings across Scotland — including the Glasgow School of Art.
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.
Messenger BCR
Heritage conservation contractors based at the Collyweston Heritage Centre in Northamptonshire, specialists in flintwork, Collyweston stone slate roofing, and complex multi-discipline conservation projects for English Heritage, the National Trust, and Royal Commission clients.
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.
Pembrokeshire Thatch and Carpentry Services
Specialist Welsh thatchers operating since 1982, reviving traditional vernacular techniques — combed wheat straw, wattle and daub, and stuff thatching — on historic longhouses, cottages and museum reconstructions.
Plasterite Mouldings
Kent-based specialist in traditional decorative plasterwork — conservation, restoration, and new work in lime and gypsum for listed buildings, National Trust properties, and period interiors across the South East.
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.
Recclesia Ltd
Multi-disciplined historic building conservation contractor specialising in stonemasonry, lime mortars, historic metalwork and stained glass, with a notable portfolio of Cadw castle and monument projects across Wales.
Stuart Interiors
Somerset-based bespoke oak joinery specialists with over 40 years' experience designing and making period interiors for historic buildings, royal palaces, and private houses across the UK and beyond.
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.