God Save The King.
There is an online book of condolence at www.royal.uk.
Anyone who wishes to sign the book but is unable to get to the church can contact the clerk (firstname.lastname@example.org) who will arrange for a page to be made available at the person's home address. This will then be added into the book at the church.
The National Moment of Reflection will take place at 8pm on Sunday 18 September, the night before the State Funeral, and be marked by a one-minute silence.
The silence can be marked privately at home, with friends and family, out on doorsteps or the street with neighbours, or at locally arranged community events and vigils.
Community groups, clubs and other organisations across the country are encouraged to take part and people overseas are also encouraged to observe the one-minute silence at 8pm local time.
Details of larger-scale public events to be held across the country will be published at: https://www.gov.uk/government/topical-events/her-majesty-queen-elizabeth-ii.