Greenwich is a conservative town, and anyone showing up in any but conservative dress will probably feel out of place. This is to be a peaceful, orderly presence. We are there to worship, not to make trouble. There may be protesters outside, or hecklers within, intent on disrupting the worship. I urge you simply to ignore them if they show up.
Any response is to invite a confrontation, and the security people are likely to be jittery enough.
I am told that it is impractical to put cards, letters, etc. I will be glad to collect any items that people want to get to the Archbishop's attention, and I will be sure that they reach him. Immediately following the service, and before we go to coffee hour, it is suggested that we go to the chapel for a few moments of silent prayer. If you still haven't found a pink triangle to wear, this can be corrected as we leave the chapel for the coffee hour. The explanatory cards will be available then, too.