Gerrymandering is the redrawing of constituency lines to ensure that a particular party wins. In Northern Ireland, the constituency lines of Derry were redrawn to ensure that Unionists would win the majority of seats. But how does gerrymandering actually work?
Diagram 1 shows more green dots that red dots, therefore the green dots should win the election.
Diagram 1
Diagrams 2 and 3 show that when you draw seven constituencies in a straightforward, linear fashion, the green dots still win a majority.