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:
Caleb Arnold
Felix David Gray
Harry Timothy (Matilda Rose & Rupert James)
Heath Philip (Alice & Henry Francis)
Henry Michael
Leo Patrick Edward (Finn)
Magnus Philip Jacob (Anatole Lawrence Nils)
Peter Jeffrey George
Ralph Henry (Ronnie David & Ned Alfred)
Rhori Finnley Jack
Vincent (Arthur)
Wilfred Gordon George (Toby Spencer Bobby, Rosanna Edith & Martha Ruby Hermione)
Wolfgang Phoenix "Wolfie" (Atticus)
Girls:
Abigail Julie
Ava Hope (Cleo Grace & Mia Daisy)
Charlotte Audrey Queenie (Harry & Max)
Charlotte Beatrice Lily
Clara Cecilia (Leo)
Eloise Grace (Oliver John Daniel)
Emily Grace (Edward Andrew & William Grainger)
Evelyn
Hetty (Otty)
Isabella Deborah Luna
Millie Margot Louise
Nina Buffy
Ottilie Rose Mary (Monty)
Robyn May (Harry)
Rosie Harriette Grace
Tallulah Elizabeth Jane (Ludovic Arthur Frederick)
Zara Michele
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.