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 "Xander" Henry Creagh
Arthur "Artie" (Charlie & Freddie)
Benjamin Philip Ralph (Lily)
Charles Nicholas Ignatius (Archie)
Jude Geoffrey Justin
Ocean Jude Michael William (half-sib: Deya)
Oliver Burdick Cecil
Oliver Robin Linus
Oscar Peter William
Rafe Lawrence Livingston (Nicholas Armistice Mallard "Nicko" & Xander Constantine William)
Tobias John Louis (Oscar James Edward)
Girls:
Evelyn Louisa May
Luna-Rose Elspet (Charlotte)
Mary Vivian (Winifred Sophia)
Octavia Louise Persephone
Twins:
Hugo & Henry (Freddie)
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.