My DNA test results say 96% Great Britain, 3% Iberian Peninsula, and <1% Irish. I'm very eager in finding out who my Irish and Iberian Peninsula ancestors are, although that could be any number of generations back. So far I have traced much of my father's side mainly 4-6 generations back, and my mother's side 3 generations back.

Can anyone give me any tips or advice on finding out who my Iberian Peninsula and Irish ancestors are?