Hi. Sorry you have not received a response for this long.
I am a PG student at Warwick and was assigned to Liberty Park as well.
Don't worry, the "official" end date of your programme is just a formality. It usually ends a few weeks before. You will likely be asked to submit your dissertation in early or mid-September. There are no more classes during the last term of the year. You just work independently on your research, and thus do not have to be anywhere near Warwick campus at all.
Did you sign your contract already? If not, think twice. It is tiny (unless you are accustomed to tiny en suite rooms, there will be some psychological adjusting to do.)