if a Celtic-style funeral is requested I will stand at all four points of the coffin and recite the Gaelic Blessing (Deep peace of the running wave to you/ Deep peace of the flowing air to you/ Deep peace of the quiet earth to you/ Deep peace of the shining stars to you/ Deep peace of the gentle night to you)
Could I just point out in the interests of accuracy because a lot of people apparently believe this to be a traditional Irish blessing, possibly because it's used by C of E celebrants that this is not in fact any kind of Irish or Scottish blessing.
It is neo-druidic Celtic kitsch from a short story by William Sharp (1855-1905), writing as his female alter-ego Fiona McLeod (whom he pretended was a real, separate person, to the point of writing a fictional Who's Who entry for her, and getting his sister to do her handwriting, and actually having a full nervous breakdown over the deception when 'she' was offered a civil list pension for her work
.)
The story is called 'The Amadan' (The Fool), and is about a depressed Hebridean fisherman who thinks he's a woman called Enya of the Dark Eyes, and is taken in by a blind man who speaks a 'spell' over him and heals him. As you do.
Those four lines are from the 'spell.' (Link in case you think I'm inventing this...)
archive.org/details/dominionofdreams00macliala/page/116/mode/2up?view=theater
I just think it's pretty odd the C of E trots out this stuff as 'traditional' without checking its sources. Especially as William Sharp was a member of the Hermetic Order of the Golden Dawn, a famously nutty secret society based on studying the occult, scrying, astral travel, alchemy where you were 'initiated' like the Freemasons -- and the 'spell' is specifically presented as non-Christian in the story. etc.
It's like using 'Expecto patronum' in a service. 