A follower on Twitter reminded me of the message that Apple published in February 2016; the nature of British surveillance requests will probably prevent them sharing similar to the UK today, but the sentiment should be the same:

The United States government has demanded that Apple take an unprecedented step which threatens the security of our customers. We oppose this order, which has implications far beyond the legal case at hand.

This moment calls for public discussion, and we want our customers and people around the country to understand what is at stake.

https://www.apple.com/customer-letter/