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:
Angus MacPherson
Billy Peregrine (Ferris Scott)
Edward "Teddy" Christopher Exton (George Exton)
Felix Francis
Fin Sorley (Meg Rosa)
Guy Charles
Hugo Robert Templer
Lewis Richard Muthaami
Ralph (Sophie & Hugo)
William Murray (Mairi Elizabeth)
Girls:
Araminta Elspeth
Cora Maud (Margot Elizabeth)
Elizaveta Raisa Cullen Ryzhkov
Grace (Wilfred)
Henrietta Alexandra
Matilda Alice
Penelope Jane
Willa Iris
Willow Mona (Winter Ernest & Else)
Twins:
Ottilie Margot Elizabeth & Florence Cordelia Mary
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.