A practice can now prohibit patients from booking same day appointments online. To do so a new setting has been added under PPAdmin > Appointments > Miscellaneous called 'Do not allow booking within max days from current date'. 

If left blank there will be no date restriction. If 0 is entered patients will be prevented from booking appointments on the same day. If 1 is entered patients will not be able to book appointments for same day or the next day.