The National Hunt meeting scheduled for Plumpton on Sunday has been abandoned by the British Horseracing Authority (BHA) as a "precautionary measure", after a confirmed case of equine influenza at a livery yard adjacent to the racecourse. The BHA said the discovery of equine flu and EHV-4 was in an unvaccinated non-thoroughbred horse based at the yard. Equine flu is highly contagious respiratory disease and can be airborne over reasonable distances and transmitted indirectly to horses, including via people. Racing in Britain was brought to a halt for six days...