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:
Billy Arlo (Lexi Grace)
Christopher Edward Cooil
Dara Richard Douglas (Lorcan & Rory)
Frederick Christopher Geoffrey (Charles Thomas David)
James Christopher (Thomas Stanley)
Laurence Kenneth
Maximilian Arthur (Ralph & Edward)
Redford Damian (Hunter Dempster & Indiana Newsum (b))
Wilfred Archie
William Nicholas George (Edward Charles Geoffrey)
Girls:
Amelie Jane
Ava Elizabeth
Brodie Mae Sylvia (River)
Elsie Jane (Iris Amy)
Evelyn Rose
Florence Thomasina Mary
India Rose (Rory)
Lily Tessa Ann
Persephone "Percy" (Antigone & Araminta)
Sienna Evelyn
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.