Hi Heather,
At the moment there 5 travellers booked on this new date and given how popular the original dates have been I would imagine there will be a few more before it departs.
In terms of flight times these are
Depart Heathrow: 10:55hrs
Arrive Heathrow: 16:30hrs
And as you've already highlighted, these are provisional timings, subject to change and would be confirmed in your final documents.
Please let us know if you go on to book this trip.
Kindest regards,
Julia