Wow, thank you so very much for the excellent advice. We were thinking it would be a good idea to change to a flight a day or two earlier but are choking on the additional costs... flight change fee, difference in price of flights and hotel cost. I tried to get help through Expedia but they are not customer friendly to put it mildly. Sadly we were not able to book flights through O because they do not handle any from the UK.
I guess we will have to change flight dates and bite the bullet cost wise. The cruise is to celebrate a big birthday for both of us so don't want to risk missing it. 😎 to be continued...