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:
Arthur Edward Hamilton
Bertie (Alfie & Milo)
Charles Tilden Laszlo
Elijah Mousa
Elliot James David (Tibby)
Frederick Henry Philip Campbell
Frederick Peter Harvey
Gil Ray (Orli & Avi)
Henry August
Jack William (Isabel Grace)
Laurence Thomas
Max Julian Bobby (Louis Walter Sempill & Orla Kate Hendrika)
Maximilian Francis Finbarr
Milo Frederick Bobby (Molly Dorothy)
Rafferty Jack Ronnie (Florence Olivia Darcy, Tobias James Atticus, Barnaby George Jonty, Arlo & Ottilie Rose Lilibet)
Rory Maximilian (Carlotta)
Rory Philip (Florence Mei, William Edward & James Rupert)
Theodore George (Louis Sebastian)
William Edward Mark (Dottie)
Girls:
Iola Angela
Lily Alice (Arthur)
Lola Grace Devereux (Leo)
Olivia Rose (William Thomas & Henry Graham Barker)
Poppie Frances Ella
Sephora Christina Grace (Keziah "Kezzie" Elizabeth Hope)
Sophia Olivia
Willa Ottilie Jemima
Twins:
Gibson Montgomery Day & Doddie Branston MacFarlane
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.