On numerous housing estates throughout London, the rows of black steel and mesh railings guarding red brick mansion blocks appear, at first glance, little more than a quirk of post-war architectural design. However, unbeknown to thousands of passersby each day, those sometimes rusting or buckled fences were in fact the emergency stretchers that helped to save the lives of those injured during the Blitz. Now, a campaign has been launched to protect and restore these metal fences, mainly found on estates in South London, that had served so well as stretchers during World War II. Rosie Shaw, founder of the...