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:
Hector Edward Ruthven
James Joseph (Geordie)
Rafe Caspian Oisín (Ivo)
Theodore Leslie
William Christopher Timothy (Francesca Elizabeth Winefride)
Girls:
Alexandra Mary Bellairs
Arabella India Jane (Hugo)
Evelyn Rose
Evie Ann
Florence Catherine Aubrey
Harriet Alice
Miranda Antonia (Alice Ingrid Elizabeth & Beatrice Hester)
Posy Poppy Elizabeth (Alfred & Rafe)
Sophia Florence Louise (Frederick Alexander Brett)
Tabitha Isabella (Ziggy & Morello)
Talitha Isabella Beatrice (Alexa & Johnny)
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.