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:
Blake Arthur James (Madison)
Conrad Richard Peter Nicholas
George (Darcie-Lou)
Hugh Charles Edgar (Charlotte Anna Kay)
Jozzion Harry
Julian Percival (Virginia)
Louis Byng Holland (Scarlett Grace Lucy)
Ned Vincent Denis (Ralph Fox & Ronnie Wolfgang)
Oliver Kerr
Theo James
Valentine Patrick John (Margot Kathleen Mary)
Girls:
Alice Leonora Céleste (Henry Ferdinand Balthazar)
Anjali Ella
Ava Isobel Edith (Oliver)
Charlotte Henrietta Sybil James (Alexandra)
Chloe Rebecca (Adam & Callum)
Clementine Alice (Rory)
Clementine Grace
Daisy Penelope Beaufoy
Delphi Daphne (Rex Ludo Marcelles & Huxton Wilbur Wyndham)
Ember Munro (Calvin Donald & Murray Alexander )
Flora Mollie Huntley
Honor Mary Elizabeth (Florence Arabella Rosalie & Ludo Maxim)
India Faith Christine
Lily Hazel (George Jonathan)
Lyra Veryan Tiger
Maeve Etta
Margot Stella
Matilda Emmeline
Maya Anthea Clare
Polly Katherine Anne (Cicely)
Reya Julie Margaret
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.