If all farm supports are withdrawn immediately on Brexit then all sectors of British farming will face immediate bankruptcy. Obviously the deranged remainiacs believe this implicitly.
This will not happen. I suggest you read the expert's views and educate yourself.

The CAP has created a system of subsidies that has created a dependency on handouts. With an average payment of 250eu/hectare it is a nice little earner. The entire system needs a comprehensive overhaul
Even after Brexit subsidies will continue. They may be radically overhauled but they will still exist.

Simply another example of project fear by the unthinking!