The matter is very clear for anyone who cares to check...
https://www.gov.uk/government/publi...side-your-home/staying-safe-outside-your-home
Point 8 seems very clear to me.
It's the media making it difficult. The government introduce emergency legislation and straight away the media are being difficult - "It makes no mention of one legged, red head pygmies from the Alsace region..." squeals Laura Kuennsberk.
It is very simple if you choose to get the info from source rather than relying on the media:
1. We know where and when we are required to wear one.
2. We know why are are required to wear one.
3. We know exactly what form they may take.
I really don't see how it could be made any clearer.