Below is a round-up of the birth announcements from British newspapers. Sources include a national paper (The Telegraph, The Times) and a broad range of local newspapers from across England, Wales, Scotland and Northern Ireland.
Sibling names are in brackets. No official surnames are included; any name ending in a surname is actually a middle name.
Boys:
Alfred Otis (Ophelia Robyn)
Angus Peregrine Oliver
Arthur Humphrey John
Charles Lawrence
Daniel Rhys (Amelia)
Edward Matthew Toby
Edward Nigel John (Hubert Christopher Geoffrey & Beatrice Christine Rosemary)
Jack Oliver
Meirion Jac (Gethin Alun)
Raef Peregrine George
Willoughby John Giddy
Girls:
Arabella Lindsay Maria
Ava Rose
Catrin Rhys (Cynan, Lowri Elen & Heledd Gwyn)
Isabelle Quinn
Jessica Aurelia (Aidan Alfred)
Lyra Grace
Margot Phoebe
Mia (Calvin Paul Henry & Seth Anthony Jack)
Romilly Jemima (Aurelia & Nathaniel)
Sienna Lily
I cross-reference older BAs to find the full names of the siblings, however often they are missing (especially the eldest siblings, or for half-siblings) which explains why you will sometimes see something like: George Henry (Lucy, Emma & Jack Arthur). "Lucy" and "Emma" may well have middle names as well; I simply cannot find them online.