This question was sent by John. And it doesn't start like a question, but rather like feedback or response to another question that we discussed earlier about improvising alternate hymn harmonizations. So John writes:
There are a number of books of varied accompaniment [published by companies such as Kevin Mayhew and Novello], but these are for hymns sung by English-speaking congregations. Eric Thiman composed two books of excellent accompaniments [published by Novello and OUP, still available]. A very effective way of beginning a final verse is by playing a flattened seventh on the pedals. Other devices include: introduce a dominant pedal towards the end of the hymn, changing major chords into minor [if possible], playing the alto line above the treble, placing the treble line in the tenor [fauxbourdon - this is quite difficult and needs to be written out in full]. My advice would be (i) get hold of Thiman's books to see the techniques he uses and (ii) if you require a varied accompaniment for a choral, write in out if you are a beginner. Do not try improvising harmonisations until you are proficient. There is no fast-track route I'm afraid. I have just seen a single copy of C H Lloyd's "Free Accompaniment of Unison Hymn Singing" available on Amazon—this is a very rare book—brilliant accompaniments written by a master. Good luck! John