Questions:
a) Why is BA not offloading pax who refuse to wear a mask. I couldn't care less about the impact on the passengers health, but I would care deeply about my health and those of other pasengers. Wearing a mask does not protect you, it protects others. BA have a duty of care and a duty to ensure compliance with the law. A month of offloading non-complying pax and the message would hit home!
b) Why were the Police not called? Quoting from the government's website "The police can take measures if members of the public do not comply with this law without a valid exemption and transport operators can deny access to their public transport services if a passenger is not wearing a face covering, or direct them to wear one or leave a service."
https://www.gov.uk/government/public...f%20%C2%A36400
c) would it be reasonable for a passenger to call the police (if an aircraft is on the ground) if the crew/captain fail to take action?