Brits are being told about a little-known warning sign of heart disease that could increase their chances of suffering a heart attack by "five times". Heart disease, which happens when the heart's blood supply becomes blocked or interrupted by a build-up of fatty substances in the coronary arteries, remains one of the UK's biggest killers . While certain indicators such as chest pressure, aching, or squeezing are widely recognised, one less obvious warning sign is leg pain . This can appear as