4.2 Orders placed before 4:30 pm on a working day will be processed that day and will be delivered as per the requested delivery option provided no additional security checks are required and all stock items are available. (A working day is any day other than weekends and bank or other public holidays.)
Log into your account and check your status, it probably should say in warehouse queue, also as mentioned before double all is in stock, this has happened to me several times.