It is quite simply the greatest prayer, says former Archbishop of Canterbury Justin Welby , but this Holy Week, I’d like to confess that having three different versions has caused me to stumble over the words I n 2023, I was at a service of prayer led by Pope Francis in Rome, in St Peter’s Square. It had leaders from every part of the Christian world. We walked through an empty St Peter’s Basilica and assembled in front of it, before an altar, and went through a service of prayer and commitment