Hi, I don't want to guide anyone down the wrong path so do take this with a pinch of salt as I'm not certain as to what goes behind decision making processes.Do firms actually care if you do their forage course?
My general take on forage courses is that, it is a good way to learn about common trainee tasks (which can be useful for determining whether the career is for you, interviews, written exercises and actual work on the vacation scheme).
Furthermore, it can be good evidence of your motivations for the firm.
However, I do not think it has much sway either way over decision making. I personally only ever completed one forage course and I don't think I even included it anywhere in my application to that firm. Whenever a firm does include a question as to whether you completed it, I think it is more so for their internal statistics and other data-gathering information. I may be wrong though!