I recently installed outlook on a new laptop - I synchronised the calendar
with my iphone via iTunes - there were 2 calendars on my iphone from a
previous installation but only the latest one was synchronised (I kept the
old calendar just for reference). Outlook has created 2 calendars on my new
system - it posts all new appointments onto the old calendar and treats this
as the master calendar - with no calendar delete option.

How can I either merge the calendars to create a single calender, else
nominate the latest calendar as the master and then delete the old one?