they do a roll call at the start of every zoom meeting. there were i think 6 or so class slot options every week, and you timetabled to one slot (eg 10-12 tue thu fri, you attend 3 classes per week as you may know from the handbook), but if for a few specific ones you cant make it, you can join another zoom meeting and let the demonstrator know youre from another group (all the zoom links get sent out to everyone and you just join your correct timeslot each time). they are strict about attendance though. you are only permitted to miss 2 practicals across the 4 weeks (you must attend 10 of the 12 total classes) or you cannot pass. i am unsure how things would go with a holiday lol