http://www.english-heritage.org.uk/  English Heritage protects England's historic environment and ensure that the past is underdood and preserved. 

http://www.nationaltrust.org.uk/  The National Trust protects the nations heritage in order that it can be enjoyed both now and in the years to come.

http://www.spab.org.uk/  Organisation commited to saving ancient buildings, providing home owners with practical knowledge.

http://www.jonathan-rhind.co.uk/  Jonathan Rhind Architects are based in Devon and Somerset and focus on conservation projects for listed and historic buildings throughout the South West.

http://www.swarch.net/  South West Archaeology is a well established practice based in South Molton, Devon.  Services include specialist reports on individual houses.

http://www.richardgreenecology.co.uk  Provides ecological consultancy services in surveys, assessments, management and design

http://www.greenbuildingpress.co.uk/  Information and publications to help you create healthy and ecological homes and buildings