Flight Gatwick to Venice
We did wish somebody somewhere had told us about internal EU flights - like the one we booked online with BA from London Gatwick to Venice Marco Polo - only allowing one suitcase per person into the hold and only one into the cabin (plus a Laptop and a hand bag).
We had to repack our suitcases at the airport.
We were VERY lucky to get an extremely helpfull service manageress - A lovely Irish lady - who helped us with selecting our cabin cases and than we repacked all our “sharp” and liquid items so that none were carried on board. The cabin items are allowed to be a lot bigger than we would ever get at the International in Perth [which is not allowing much into cabins at all ;-( ]
After that the flight to Venice was easy and over in a flash - just enough time for a coffee and two sandwiches supplied as in-flight meals 
We had some wait (long line of passengers) before getting a taxi to our Hotel for the next 3 nights in Mestre. 30 EUR was not cheap - but than we found out nothing is cheap in Venice …… (except the water busses when there isn’t a strike and you only can get to some stations).