The governing board's role in banning parents
As a board, you won't be involved in the decision to ban a parent, because this is an operational decision for your senior leaders.
Instead, you could be involved in reviewing the ban.
You might need to review the headteacher's decision immediately after they impose a ban. This is because your school needs to decide whether to confirm the ban or not, and this decision might fall to the chair of the governing board.
However, it's likely that your board will review bans at a later date, to help decide whether to keep them in place or to allow the parent onto the site again.
You'll need to check your school's parent code of conduct or policy for behaviour on the school site for more information on your involvement after a parent has been banned.
Even if you're not involved until the review stage, it's