Yes and just to add we did have a period last year from July to December when the face covering SI in England was revoked and HAL and BA (at least for English airspace) were relying on their own policies. Since late January we are in that position again as the SI for England was allowed to lapse.

I agree the requirements for airports and airlines will continue for a while, but perhaps this may start to change later this year as more countries drop mask laws.