Going off topic, for the sake of clarification 'So Help Me God' might be seen in films, and if varies from one country to another, but it isn't part of the Oath in UK Courts, and there's no requirement to mention God at all - anyone taking the oath can 'affirm' instead, or people of other religions can (for example) swear by Allah/by Waheguru/on the Gita.
In England, Wales and Australia:
Oath:
I" swear by [substitute Almighty God/Name of God (such as
Jehovah) or the name of the holy scripture] that the evidence I shall give shall be the truth, the whole truth, and nothing but the truth".
Affirmation:
"I do solemnly and sincerely and truly declare and affirm that the evidence I shall give shall be the truth, the whole truth, and nothing but the truth".
In the UK, a person may give testimony at any age, but won't be sworn-in unless 14 years old or over, and under 18. But they don't 'swear' (because children (at least a few) are taught that swearing is a bad thing to do. Instead, they 'promise:
Promise:
"I promise before Almighty God that the evidence which I shall give shall be the truth, the whole truth, and nothing but the truth".
In the 25 years I sat as a magistrate, surprisingly perhaps, the only people I can recall not 'swearing by almighty God' and instead who affirmed, were devout Christians and Quakers. Their decision was based on the Bible - James 5:12, which states:
‘Above all, my beloved, do not swear, either by heaven or by earth or by any other oath, but let your “Yes” be yes and your “No” be no, so that you may not fall under condemnation’.
A major study of 24 countries in 2022 found that Just under half (49%) of Britons said they believed in God – down from three-quarters (75%) in 1981. Of 24 nations in the study, only four are now less likely than the UK to say they believe in God, Sweden (27%), South Korea (16%), China (16%) and Japan (14%):
God, heaven and hell, and life after death: data reveals UK's low religious belief compared with other nations.
Sworn testimony is evidence given by a witness who has made a commitment to tell the truth. If the witness is later found to have lied whilst bound by that commitment, they can be charged with the crime of perjury, but there's no reminder of that risk to them in the oath.
Given the low level of 'religiosity' in the UK, it seems to me that it would be far better to update the oath by removing all religious references and instead, something on the lines of:
"I understand that the evidence which I shall give shall be the truth, the whole truth, and nothing but the truth, and that if I do not tell the truth I commit the crime of perjury, which is an imprisonable offence".
Jurors don't give evidence - they listen to it, so take a different oath:
"I swear by almighty God/by Allah/by Waheguru/on the Gita"; for an affirmation the wording is "I solemnly, sincerely and truly declare and affirm". This is followed in both cases by: "that I will faithfully try the defendant and give a true verdict according to the evidence".
A recent study of British citizens found for the first time, that defendants who don't 'swear by almighty God' in Court are more likely to be found guilty by jurors who do.
Study finds jurors biased against those who don’t swear to god
Sorry to digress but I think this thread has (rightly), had so much input, and will doubtless continue to do so as the enquiry proceeds and justice at last prevails, that a little digression might be permitted.
A note to end on:
What would Jesus do?
'The Ballad of Paula Vennells':
https://www.postofficescandal.uk/newsletter/the-ballad-of-paula-vennells/