You asked

I would like to know the total number of farms affected by BSE in cattle since 1985.

I would like this information sorted by year, and I would also like to know the total mean average of cattle affected at all farms.

We said

Following a search of our paper and electronic records, we have established that the information you requested is not held by the Office for National Statistics. The Department for Environment, Food and Rural Affairs may be better placed to respond to your request and can be contacted using the link provided: https://www.gov.uk/government/organisations/department-for-environment-food-rural-affairs