Specific details of alternative exam venues will usually be provided on your personal timetable if you have a Reasonable Adjustment Plan (RAP) or Student Support Advice (SSA).
If your timetable indicates that your exam venue is Departmental then your School/Department will provide you with the details of your exam venue at a later date.
Your personal timetable will not include any extra time or rest breaks, the Invigilator in the venue will have this information.