The current situation
The island of Ireland is currently split between the Republic of Ireland in the south and Northern Ireland (part of the United Kingdom) in the north. Each side has their own flag, but there is no single neutral design to represent the whole of Ireland. This is a problem when there are many all-Ireland organisations and sporting-teams. Many of these compete internationally but cannot use an official neutral all-Ireland flag because no such design exists. Instead, each one uses their own ad hoc compromise design. A well-known example is the Four Provinces flag (displayed above) that just combines the individual flags of each of Ireland’s four provinces so as to represent the entire island in a disunited, clumsy and complex way.
Compare this situation with the Korean peninsula: Although it is split between North Korea and South Korea, there is a single neutral official flag to represent the whole of Korea for joint organisations and sporting teams.
Also, the future possibility of Irish unification is becoming more and more plausible. If this possibility escalates into a real scenario, the island will require an acceptable symbol that is neutral and not associated with only one side. Polls show that creating a new flag in the event of Irish reunification is the most popular option among both the public and politicians.
Therefore, here is my proposal.
Note: My choice of designs do not reflect my political opinions.