Originally Posted by TyneTraveller

I was just about to say the easiest way to double check is exactly how KARFA had suggested, on the booking screen under the fare rules section. However after quickly checking booking into the cheapest semi flex without on the day change fees, it appears the OP is actually correct. Most of the basic info is there, but I can't find anything that says "At least 1 hour’s notice must be given prior to the scheduled departure time."