Back on topic, we are agreed, Tam, that BNP teachers are a problem, but, while it might be possible to remove party members, how would we handle sympathisers and fellow travellers.

Thought police is a concept even more revolting than BNP (marginally), and impractical to boot.

I would suggest that (absent mindreading) this is an impossible task. That said, are we making the classroom any safer by removing the visible (which can be monitored), while leaving in situ the invisible (which cannot)?

Don T.