[webjames]

This is an interesting point - If Apple decided that the requirements set out by the UK Government were at odds with its ethos and chose not to comply -

Would this result in a sales/import ban?

How would this effect devices already in circulation?

This would certainly educate the populous that the conversations happening in parliament and the media do/are having a direct impact into their daily lives - especially if it means someone is considering banning their favorite phone.