Committee of Management

The main committee for 2023-24 was elected at the Annual General Meeting held in Lincoln in September 2023:

David Wiggins, Convenor, undertook doctoral research into the functional behaviour and technical conservation of heritage masonry at Glasgow Caledonian University. He is a structural engineer, formerly part of the Heritage & Conservation team at Curtins Consulting Ltd., now with his own practice Clach Conservation Engineering. His work focuses on the structural repair and conservation of architectural and civil engineering heritage.

Maria-Elena Calderón, Vice Convenor, is Senior Building Conservation Advisory Historic England. Maria has degrees in Ancient History & Archaeology and Building Conservation. She has worked extensively within buildings archaeology across the UK and Middle-East before concentrating on conservation. In her prior role, she led on cultural projects for the Land of Iron project and assists with planning at the North York Moors National Park Authority.

Roz Artis, Treasurer, is a chartered building surveyor accredited in building conservation.  Roz is currently director of the Scottish Lime Centre Trust in Charlestown, Fife, and former committee member of the BLF. Her publications on the practical use of lime and other mortars include Natural Stone Masonry in Modern Scottish Construction and various articles for the BLF Journal and The Building Conservation Directory.

Alison Henry, Journal Editor-in-Chief, Senior Architectural Conservator in the Building Conservation and Research Team at Historic England. Co-Editor of the stone, mortars and earth volumes of the Practical Building Conservation series. Alison was previously a local authority conservation officer, has run her own stone conservation business, and taught stone conservation at Weymouth College.

Philip Braithwaite is Director of UK Restoration Services which is based in Burnley, Lancashire. UK Restoration Services have been built on Phil’s quality workmanship and high standard of service which has formed the business foundations.  Philip has many years of experience working within the restoration sector and shows great enthusiasm for the preservation of historic buildings and landmarks.

Phil Brown has been a BLF member since 1993.  A time-served builder, Phil is the owner / M. D. of Cornish Lime, the largest manufacturer of lime putty in the UK as well as a distributor for St. Astier NHL products and other products used in building conservation.  A passionate advocate for lime and a regular at the BLF Gatherings, Phil brings to the committee 40 plus years spent in the building industry, 25 of them working with lime materials.

Philip Scorer is Director of Vitruvius Conservation Ltd. Contractor and consultant with 25 years’ experience in conservation. Specialist in rope access work on churches and cathedrals. Former lecturer at Weymouth college teaching building conservation. Coordinator of the 2020 BLF Conference and Gathering at Exeter.

Stephen Waite, AIA RIBA, is a conservation architect based near Seattle, USA. In addition to his US training, Steve also earned a Building Conservation PDD (West Dean College) and an MSc, Building Conservation (Bournemouth University). He is an advocate of lime use for the American west coast, as well for his projects in Cuba, Hawaii and SE Asia.

Jamie Wallace is the director of Saxum Stonemsons in Sussex which is a small team of enthusiastic craftsmen and women who are specifically trained in repairing old houses, bridges, boundary walls, ruins and churches using lime mortar and plasters. As a science graduate Jamie is an enthusiastic researcher of lime mortars and provides training courses for home owners and trades in working with lime.

Daahir Mohamed, is an experienced lime plasterer based in Bristol, and runs his own business focusing on renovations and repairs of heritage properties. He is passionate about building conservation, having completed the William Morris Crafts Fellowship with the Society for the Protection of Ancient Buildings in 2022. Daahir actively promotes social causes in Bristol, with eight years experience as a charity Trustee. Daahir was co-opted on to the committee in November 2023.

Corey Lane, co-opted on the committee in November 2023.

Rosemary Mann, Administrator. The Building Limes Forum is administered by Rosemary Mann, BLF Administrator since 2000. Rosemary lives and works in central Edinburgh and has a long-term involvement with her local community. Rosemary runs a number of charities, mainly to do with the built environment and church heritage.

Tyler Lott Johnston, Manager.  The Building Limes Forum is managed by Tyler Lott Johnston who, joined the BLF staff in 2022. Tyler is an experienced building conservator and is passionate about the use of lime in the built environment. As director of building conservation firm CODÆH, she works with clients across the UK and beyond to spread accessibility and knowledge of appropriate building conservation practices to new and diverse audiences.  She also serves as Trustee and Scottish Chair for the Society for the Protection of Ancient Buildings (SPAB), and Trustee For Built Environment Forum Scotland (BEFS).


In this section

2024 Conference and Gathering

The next BLF Conference and Gathering will be held in Brighton, 6-8 September.  Booking will open in May, but hold the dates!

Events in 2024

Watch this space for lime days and other events in 2024.


Become a member

Members of the Building Limes Forum form a community of lime enthusiasts and practitioners, most of whom are producers, suppliers, specifiers or users of lime.

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Useful documents

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Building Limes Forum
Riddle’s Court
322 Lawnmarket
Edinburgh, EH1 2PG, UK

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