I think this is an interesting idea for a thread.
Hopefully there will be several responses and it will go on to show just how difficult it is to accurately predict the grade boundaries.
I’d guess the grade boundaries will be similar to 2019, perhaps a mark or two for each grade lower to account for disruption due to the pandemic.
Though I do think it is worth pointing out that the grade boundaries will take into account the relative performance of the cohort as a whole. If the grade boundaries are high, all that means is that you lot just performed well so you ought to pat yourselves on the back - especially if you meet the conditions for any offers etc.