Mark - The system is still saying depart St Pancras at 10:55hrs and return St Pancras 16:05hrs. Like with flights these are always subject to change and confirmed in your final documents.
Jaya - Like the May departure, we'd ideally like around 12 travellers. Given that it is a short break to Europe, I would image that travellers would book closer to the departure date and there are still a number of months to go.
Kindest regards,
Julia