I had a conversation with 2 teachers of primary school level yesterday. They both said even with a reduced number of children (10-15) it was impossible to enforce social distancing amongst children because they take no notice. These are schools open for children of key workers.
So rather than the teaching unions acting under their natural Bolshevik impulses as front paged by the Mail and The Scum, maybe, just maybe, the teaching unions are doing their best to restrict the spread of the virus, and protect their members best interest, and thst of their wider extended families