As others said.
Just for future reference, a new term always starts on Tuesday and a new academic year always starts on the first Tuesday of October.
Just checked King's website (as they're very good at providing up-to-date info on website) , and they says freshers should arrive on Friday 30 sep.
So it's possible some colleges ask their students to arrive a day before the pre-freshers week weekend, maybe to avoid too much arrivals in one weekend.
So please check with your colleges welcome pack, especially if your college is in central location and does not have a large car park.