University of Chester First Deposit

The university said I needed to make my first 5000 pound tuition deposit before getting the last of my forms. I'm an international first year and can't find anywhere when this first deposit is due. I can't fulfill my conditional offer until June because they require my official high school transcript, and I don't graduate until June. When should I make this deposit? I can ask them as well, but they usually take a long time to answer emails, and I was hoping this would give me an idea before I emailed them.