From the comments I've gathered that the best way to do this is using an unwind segue. This can be done as follows:
Insert IBAction in segue I want to unwind to:
.h
- (IBAction)unwindToMain:(UIStoryboardSegue *)unwindSegue;
.m
- (IBAction)unwindToMain:(UIStoryboardSegue *)unwindSegue
{
//Allows us to unwind back to this segue
}
Then simply ctrl dragging between the button in my second view controller and selecting the segue.
It is possible to find a good tutorial on this here: