The parliament might stop clocks changing in 2021 Watch
The EU is going to abandon summer time in 2021 so unless we do, there will be a time border between NI and ROI 6 months of the year.
Before 1916 Ireland was in a different time zone to Great Britain.
Why didn't they just have a lie in and start work later during the Winter months? Fiddling around with the clocks doesn't actually give you any more hours of daylight in a day, it doesn't magically change the Earth's relative position to the Sun. The whole notion of putting clocks backwards and forwards seems to me to have been a pretty pointless excercise from the very start, it makes little sense at all when you really think about it.