Are you competing in the competition or just watching? Is it something you've been training for a few months? If so, I'd contact the firm and explain the situation and ask their advice. People miss a day of a scheme for various reasons fairly frequently (it's happened on both the schemes I've attended) and I doubt it would count again you too much but obviously you want to attend as many days as you can so you give yourself the best chance to impress!If anyone has any advice about clashing dates with vacation schemes - I have just been offered a vac scheme for the week of 28th June, but have a large sports competition on the Friday of the scheme. Would it be a good idea to ask the firm if I can have the day away from the scheme or should I just drop my commitments?
If you are keen to do the competition, the fact it's a Friday may be helpful as normally there aren't any assessments or anything during a scheme on that day - you may miss a social though!