Hi Madwife,
I'm on this trip from Manchester and received the phone call about the flight change, I think there was about 50 mins between the flights originally and now will be a few hours, I wasn't told about an overnight stay.
A few hours later makes sense as on a couple of occasions were I have had a period of 1 and half hours between flights, the flight before has been late and then by the time you've cleared immigration etc. you've missed the connecting flight.
It happened to the National Parks trip I was on in Sept 2013 flying into Atlanta where about 2 thirds of the group ended up staying the night in Atlanta after being assured by the airline that there was plenty of time.
Then last year (with another travel company) returned to Heathrow from Boston and missed the connecting flight by 5 mins after being assured again by the airline staff that there was plenty of time. In this case I ended having to make my own arrangements to get back home using the train from Heathrow for which the holiday company later reimbursed me.
Looking forward to the trip.
Regards,
SteveW