The observant amongst you may have noticed that all this talk about Ireland being under-represented should be a moot point. The country shouldn't be there at all!
The Republic of Ireland has not been in the United Kingdom since December 6th 1922. When the nation earned its independence (after a victorious, but devastating war), everyone expected that the St Patrick's Flag would simply be removed.
It wasn't, because the United Kingdom had retained Northern Ireland. This was despite the fact that the Red Hand of Ulster, which is emblematic of that country, is nowhere to be seen on the Union Flag. Instead, the St Patrick's Saltire that is shown is representative of the entire of Ireland.
This caused an immediate issue for the new Republic of Ireland, which found itself unable to use its own national flag.
There have occasionally been questions asked in the Dáil Éireann about this. Ministers have suggested sending diplomatic representation to Westminster, formally requesting that Ireland be removed from the Union Flag. But there's no record of Eire having actually done it.
In reality, there's no need beyond the whole morality of the issue. Eire forged on ahead, as its own nation, under a green, white and orange tricolor that better matched the country's hard-won freedom. It was designed by a group of sympathetic French women in 1848, in early recognition of the fact that Ireland should be free.
It was this tricolor, not the St Patrick's Saltire, which was raised above the General Post Office during the Easter Rising of 1916. It was this which had more meaning to the Irish people.
However, it's still an ominous indication of the real thoughts in Westminster that the saltire of the whole of Ireland was never taken out of the Union Flag.