Liz Truss, the UK prime minister, is reading the second lesson from John 14: 1–9.
Truss has been in the job less than two weeks; she met the Queen two days before the monarch's death to formally take up the role, in what would be the Elizabeth II's final act of official service.
Her reading follows a rendition by the choir by Judith Weir, Master of the King's Music.
"Let not your heart be troubled: ye believe in God, believe also in me. In my Father’s house are many mansions: if it were not so, I would have told you," Truss reads.
"I go to prepare a place for you. And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also. And whither I go ye know, and the way ye know.
"Thomas saith unto him, Lord, we know not whither thou goest; and how can we know the way? Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.
"Philip saith unto him, Lord, shew us the Father, and it sufficeth us. Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? He that hath seen me hath seen the Father."