Stock take freezes are now here! 
You can start a freeze when you begin a stock take, or at any time from the stock takes page. While it runs, stock cannot be moved, packaged, dispatched, assigned to deliveries, received in or used up anywhere in your brewery, so nothing shifts underneath you while you count.
Your sales team isn’t blocked, though: ordering carry on exactly as normal throughout, because placing an order only affects available quantities rather than the stock you physically hold.
There’s a guide covering exactly what a freeze does and doesn’t lock: Breww | Stock take freezes | Help guides
The full announcement is here: Stock takes just got much easier to run