If you look at this link, for the port of Venice, it shows Queen Anne due to depart at midday on Wednesday 24 April.
https://venezia.ilogis.it/riepiloghi/pages/riepilogoNavi/layout_riepilogoNavi.zul;jsessionid=FCB3E3FF00197775D05D6AA3DD1B74CB
She will clearly need a number of days to get to Southampton, so I assume the will release some of the dock reservations and I assume instead of arriving Saturday I am guessing more like Tuesday? Must be a week at QA's max speed of 21 knots, and likely need to do a few other things on the way too?