Bovine viral diarrhoea (BVD) is a major cattle disease caused in the UK by BVD virus type 1 (BVDV1). Other livestock pestiviruses (BVDV type 2 and Border Disease Virus) can also infect cattle. BVDV1 generally causes mild clinical signs, however abortion, stillbirth and birth of persistently infected (PI) calves can also occur. BVDV2 outbreaks in BVD-free herds carry more severe consequences. Scotland’s BVDV eradication programme, started in 2012, has reduced the number of infected animals significantly, but dairy herds remain particularly affected by BVDV. BVDV2 infections must be reported ‘as soon as possible’ to APHA, however current large scale diagnostic tests do not distinguish between these pestiviruses. A Moredun in-house test can differentiate the three viruses, however validation is required for use with eartags. We intend to validate this and other PCR-based assays and produce a report to allow informed policy decisions on BVDV testing in Scotland.