A neighbour told me about the annual passes the other day, they are well worth it if you live close enough. £100 for an adult and £75 for a child. She said they go once or twice a week in the school holidays. Link https://www.longleat.co.uk/ticket/annual-pass
We've been to a few over the last 6 or so years. They are superb.
Went last year and this is fantastic. I used clubcard vouchers which I assume is still better value?