The following info and links then to be found under defra publications and advice

 

Code of Recommendations for the Welfare of Livestock - Sheep

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/69365/pb5162-sheep-041028.pdf

 

Sheep and goats: health regulations

https://www.gov.uk/guidance/monitoring-prevention-and-control-of-disease-in-sheep-and-goats

 

Registration of sheep holdings (England, Wales and Scotland)

https://www.gov.uk/registration-of-sheep-holdings

 

Keeping sheep, goats, pigs and deer – identification, recording and reporting movements

https://www.gov.uk/government/collections/guidance-for-keepers-of-sheep-goats-and-pigs#ear-tags-and-slapmarks:-approved-suppliers,-replacements-and-feedback