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:
Albert "Bertie" Alexander Steed
Arthur Digby Roland (Christopher "Kit" Robert Airey)
Cillian Noah Thomas (Raife Theodore Ian)
Digby Jon Rex (Henry George Christopher)
Geordie Hector (Frank William & Douglas James)
James Robert Edward
Oscar Charles (Ella Constance)
Robert William Kiley
Girls:
Ada Raine
Annie Mabel
Audrey Rose (Margot Stella)
Audrey Virginia
Boudicca Ete Lilou (Cressida Lucy Florence, Rocco & Aubrey [twin boys] & Zsa Zsa Hermione Christobel)
Clara Primrose (Ludo)
Claudia (Julius)
Clementine Amy Martha (Wilfred Henry Atticus & Jemima Florence Hester)
Nefeli
Poppy Primrose Loïs (Bertie)
Primrose Amélie (Arnaud James & Wilfred Robert)
Sophia Charlotte (Barnaby & Albert)
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.