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:
Alexander Jack Patrick (Wilbur James Clive)
Feliz Balthazar Jafari
Finnian Simon
Henry Kit James
Hugo William
Lachlan Thomas Templeton
Sonny Ian (Noah)
Girls:
Charlotte Louisa (Oliver)
Esme Anna
Imogen Eloise
Kaci Kate Katrina
Lena Mary
Livia Sarah
Maeve Grainne
Maggie Gwen
Pearl Iris (Primrose & Florence)
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.