(An intermittent and important issue on which the advice below has been published)
Society for the Protection of Ancient Buildings (SPAB) Guidance –Technical Q&A 31, Floods and Old Buildings: http://www.spab.org.uk/advice/technical-qas/technical-qa-31-floods-and-old-buildings/ For free technical advice and information on every aspect of repairing and caring for old buildings including appropriate materials, contractors & professionals phone 020 74560916, Mon to Fri, 9.30 to 12.30
Historic England Guidance – Flooding and Historic Buildings: http://historicengland.org.uk/images-books/publications/flooding-and-historic-buildings-2ednrev/
CIRIA Guidance – Repair and restoration of buildings following floods: http://www.ciria.com/flooding/
National Flood Forum – Advice on what to do if about to be, or at risk of flooding: http://www.nationalfloodforum.org.uk
Ecclesiastical Insurance – Checklist for church properties to prepare for flooding: http://www.ecclesiastical.com/churchmatters/images/church-flood-checklist.pdf The checklist focuses on simple actions that can be taken to reduce the damage a flood may cause, but also includes practical advice on drying out and cleaning up property and undertaking any repairs or replacements after flood damage. It highlights: the importance of making a photographic record of areas or items affected by flood water; retention of damaged items until advised by the insurers; ensuring that any emergency works comply with Listed Building legislation, if appropriate; health and safety issues associated with contaminated flood water.
Church of England – adjusting for regular flooding http://cofecomms.tumblr.com/post/137629558362/keeping-the-water-at-bay-how-churches-can-adjust