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:
Caleb William
Caspian Fitzwalter
Edmund "Teddy" John Lysander
Isaiah Ian Eben Abayomi
Mateo Francisco (Sophia Maria)
Maximilian Arthur Hugh
Rafe
Tristan Sinclair
Girls:
Arabella Fflur
Cordelia Anita (Rosanna Camilla)
Elizabeth "Eliza" Mary Constance
Eva Leila MacLeod (Max Robin Wynford)
Giulia Evelyn (Giacomo Arthur)
Grace May (James Duncan & Grant Edward)
Harriet Eleanor (Imogen Lily)
Isla Mae
Isla Olivia (Jack Anthony James)
Lily Rosemary (Leo James Christopher)
Mary Anna
Scarlet Paige
Zadie Anne Storm
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.