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:
Constantine Caleb Rhett (Frederick George Petter & Axel Henry Algernon)
James Steven
Joshua Rhys (Eloise Sarah)
Leo Joseph (Rex)
Louie Michael Freddie (Alfie)
Ludo Felix Edward (Rafe Montague Francis)
Theodore James (Sylvia)
Girls:
Amber Elizabeth (Cedric James)
Bluebell Olive (Otis)
Eden Margaret (Richard William (Jr) & Cameron Ronald)
Isla Bella Rae
Leonora Christina Elizabeth
Ophelia Elizabeth Simpkin (Beatrice Marie Louise)
Poppy Christine Romney
Rose Elizabeth (Allegra Sophia)
Sienna Emily
Sofia Charlotte
Sophie Elizabeth Zara (George Lewis Samuel & Daniel Oliver Kayvan)
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.