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:
Arlo James
Caspar Constantine Boothby (Cosmo Rafael Brooke)
Clyde John
George Michael St John
Harry Felix
Hunter
Jacob Falcon (Ottilie)
Jago Aidan
Luke (Haydn)
Max Paul
Wilfred Humphrey
Girls:
Alice Florence Yolande (Elizabeth "Eliza" Catherine Rose)
Anna Jane (Charlie Thomas)
Beatrix Mary Joy (Gracie, Evey-Jane, Nicolle & Matilda Victoria Louise)
Callie Naya (Alfie-Oscar)
Charlotte Grace
Eithne Jenny Gillian
Evelyn Anne
India Ottilie Rose
Isabella Rose Elizabeth
Khloe Margoux Louise
Ophelia Isabelle (Ottilie)
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.