Hi Pat, you can use, UK_Flags-34.png
Found under UK_flag_Images
This is the Green, White and Orange Ireland Flag.
Just go to the biography and delete the flag that is wrong and type in UK_Flags-34.png and your good to go.
Remember some flags are shown in detail as in the UK Category, which covers a lot of places in Europe, Witch are part of the UK, whereas Europe concentrates mainly on the Flags that pertain to the Eu.
A lot of the UK Flags are not under the Europe Flags Category
I hope this helps you.