As a member of SLT, I think it is really important to be on site. I have worked from home maybe twice when a deadline was approaching that, if missed, would have negatively impacted most of the school community.
I would also add, however, that some posters have demonstrated a lack of understanding about the 'paperwork' that we apparently choose to do at the expense of being with the kids. If it weren't for my 'paperwork' our school would be a safety hazard, we would never refer our pupils to camhs or other services that they NEED, we would have no extra funding for extra TAs for children with complex needs, no medical supplies, training or procedures, no links with specialists, no sense of how we can improve our practice and keep up to date with our pedagogy, no school meals, no idea of who has a nut allergy, no supply teachers or TAs, and we would have the LA on our back because we had not submitted an outline of how we are spending out Pupil Premium money. The list is endless. Far too many teachers do not understand that the SLT oversee the operational side of the school which does, unfortunately, require some paperwork to be done effectively. I also work way over my contracted hours, but most staff don't realise that.
I will probably get flamed for this, but I am just giving an alternative perspective to the main narrative here. Teachers are fab, by the say. It's just that nod all SLTs are the enemy.