original_query: What is the significance of Britannia United being an 'Affirming Congregation' of the United Church of Canada? 
query: What is the significance of Britannia United Church being an 'Affirming Congregation' of the United Church of Canada?
answer: Being an 'Affirming Congregation' signifies Britannia United Church's welcoming and inclusive stance, particularly regarding LGBTQ+ rights, as part of its broader social activism.