As a former Anglican I’m intrigued by the Customary of Our Lady of Walsingham which is the Catholic version of the Anglican Daily Prayers in traditional English and goes through the entire Psalter from beginning to end every month. The Psalms are the Coverdale Psalter and the Scripture portions are apparently the RSV-CE. I drool at the thought of using it. But I don’t understand why it is so big when the entire Book of Common Prayer was compact and could fit in the pocket.
If non-ordinariate Catholic laity use the Customary of Our Lady of Walsingham instead of the Liturgy of the Hours or Divine Office, would it still be considered the Prayer of the Church, or a private devotion?
By the way, as far as I know, the bishops conference in Japan has not approved or rejected any English version of the Liturgy of the Hours, so the restrictions concerning English versions might be different here if they exist at all.