I personally found my offer holder day really helpful as at the time I was unsure which uni I wanted to make my firm choice. For me, the day meant I could revisit my course, ask questions and also have a look round the uni to confirm whether BCU was right for me.
An offer holder day isn't compulsory, but if you would like some more information to help make your decision, it could be beneficial. Most courses at BCU will also hold subject taster sessions on the day, so you can experience what a session on that course may look like. And all the students who attend will also have an offer, so it can be beneficial to get to know your potential future course mates while you're there.