The requirements for a UK Animal Test Certificate (ATC or “field trial permit”) were dramatically revised in December 2015, reinstating the UK as an attractive location for veterinary field trials. The UK has long been a recognised location for the conduct of veterinary clinical field trials. Not only is the UK one of the largest Animal Health markets in Europe, the Veterinary Medicines Directorate (VMD) is also a very active and influential regulatory agency in the EU. As Julian Braidwood, Managing Director of Triveritas, illustrates, the new UK ATC application process has been greatly simplified, appears similar to that for many other EU member states, and is now aligned with the VICH Guideline 9 (good clinical practice or GCPv).