For beef and lamb and dairy – antibiotic usage has to be recorded by product name. Red Tractor has a template for this although some vet practices may be able to provide one: https://assurance.redtractor.org.uk/tools-and-library/templates
For pigs – antibiotic collation recorded on the electronic Medicine Book quarterly, online.
For poultry – Record total antibiotics used per crop in mg/PCU, according to the British Poultry Antibiotic Stewardship guidelines.