Hi Julia,
Thanks for confirming my flight details. As long as the day/date of departure and arrival back in the U.K. haven't changed that's fine.
As per Brian's original post, I personally don't think there's much difference between British Airways, EasyJet, or Jet2 for that matter, especially now British Airways no longer serve free food/drinks, and are now putting extra seats in their aircraft so they can carry more passengers per flight. Sicily is a short flight so it should be fine, and Gatwick is a nice airport to get around with the free train between terminals- it's just a nightmare to get to for me so I prefer Heathrow.
Hope you enjoy your holiday and post a review when you get back.
Regards
Caroline