This will have huge implications for regional airlines where aircraft fly multiple sectors per day and have less than 50 seats.
For example each Loganair / Eastern / Stobart aircraft fly up to 10 sectors in a day.
You can claim "compensation" if your flight is delayed for more than 3 hours if the weather from a previous sector is a reason for the delay... Imagine the knock on effect if the first sector is delayed.
This will cost jobs and I expect some regionals will go under because of it