"Abide with Me" is a Christian hymn by Scottish Anglican Henry Francis Lyte, most often sung to William Henry Monk's tune "Eventide."
The hymn is sung at the annual ANZAC Day services in Australia and New Zealand, and in some Remembrance Day services in Canada and the United Kingdom. It is also played by the combined bands of the Indian Armed Forces during the annual Beating Retreat ceremony held on 29 January at Vijay Chowk, New Delhi, which officially marks the end of Republic Day celebrations. A choral version of this hymn has been arranged by Moses Hogan.

The "Last Post" can be either a B♭ bugle call within British Infantry regiments or an E♭ cavalry trumpet call in British Cavalry and Royal Regiment of Artillery (Royal Horse Artillery and Royal Artillery) used at Commonwealth military funerals and ceremonies commemorating those who have been killed in war.
The two regimental traditions have separate music for the calls (see Trumpet & Bugle Calls for the British Army 1966). Whilst the infantry (B♭ bugle) version is the better known of the two versions of the call the E♭ cavalry trumpet version is the tune used by the state trumpeters of the Household Cavalry.