Your room should be ready for you to move in any time after 2pm on the first day of your contract.
You can arrive any time on any day/date after that.
When you check in, reception will have your key and everything else you need. Reception is staffed 24 hours a day, 7 days a week.
You don't have to tell us if you're arriving later than your official contract start date - but please remember that accommodation fees are charged from the start date of your contract, not from the date you move in.
If you want to arrive EARLIER than your contract start date, you must tell Housing Services well in advance. See this separate FAQ: http://connaughthall.blogspot.co.uk/2013/08/faq-arriving-earlier-than-datetime.html.
If you are having problems with your accommodation offer, personal details form, or any other of the welcome arrangements, see this FAQ: http://connaughthall.blogspot.co.uk/2013/08/faq-augustseptember-problems-with-offer.html.