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:
Caspar Alastair (Lily Alice Eve)
Gabriel Xavier
Max Otis (Rafe Merlin)
Montague Edward Michael "Monty"
Percival William Templer (Jasper George de Dibon)
Robert John Francis (Marianne)
Girls:
Antonia Georgina Lara (Alexander Edward Herbert)
Beatriz Joy
Daphne Mary Antigone
Elizabeth Vivienne (Edward Valentine - born on Valentine's Day)
Emilia Anne Margaret (Jack David William & Arthur Robert James)
Isla Mary Elizabeth
Maeve Isabella
Maya Victoria
Phoebe Annabel Elaine
Ruby Melita
Scarlett Arabella Gillian Emilia
Serafina Alma (Quinn)
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.