I note the brother has been “farming the land for some years”.
I suggest it is important to identify when the arrangement with the brother first started as, if before 1 September 1995, it would be governed by the Agricultural Holdings Act 1986 and may not be so easy to terminate. If the client inherited the land and an arrangement with the brother was already in place, the relevant date is likely to be when the brother first entered into an arrangement, not when the client acquired ownership.
Paul Saunders