But that won't be because the people in those towns are watching Spanish or German football instead. It'll be because they're watching/following a bigger English club in the region. And they'll also bear no ill will towards their local non-league side and happily go watch them when they're doing well, whereas in Ireland those who love English football often have a real disdain for the LOI.
There's also usually a lot of overlap in support between big and little clubs in close proximity in England - almost like a big brother little brother thing. So Gateshead's crowds go up whenever Newcastle aren't at home, for example. A decent numberof English fans would actively support both a big and a little club at the same time.
This webpiece sums it all up for me :
THE BEST SUPPORTERS IN THE WORLD? IRELAND’S ENDURING DELUSION – Between the Stripes