Photography by Kris Clay of www.topgearphotos.comLead Photograph: Lisa Falk and Gitana (from Germany)  The Seacliff endurance event, run by Scottish Endurance Riding Club (SERC), boasts a...

Words by Susan Kirwan BVMS, FRCPath MRCVSClinical pathologist, Nationwide Laboratories In 1906, the Viennese paediatrician Clemens von Pirquet noted that some of his patients were...