British tourists were struck down with a series of horror symptoms before they died from a mystery stomach bug on holiday in a sunkissed paradise. Four tourists, Elena Walsh, 64, from Birmingham, Mark Ashley, 55, of Bedfordshire, 64-year-old Karen Pooley, from Gloucestershire, and a 56-year-old man all died last year after contracting severe gastric illnesses. The group of four died within a four month period after holidays in Cape Verde islands of the coast of west Africa, and are among six in