You might be able to pick up the signal overflow depending on your area. I checked the time difference between analogue and digital with 2 tv's side by side before racing and during it yesterday and it's about 5-6 seconds, it was good enough for me to make a few quid in running anyway

You'll know you have the Irish analogue when there's a "X 24 October" in the bottom right of the screen, that's when Irish analogue is turned off.