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:
Archie Rhys
Caleb David Geoffrey
Edward Felix (John Francis "Johnny" & Wilfred Francis)
Felix William Albert (Edith)
Hugo Alexander Oliver
James Wilfred Leo (Laetitia Lily Natasha)
Ned William Henry (Mia Antonia Jane)
Otto Guy Frederick
Girls:
Astrid Mary Ulla
Aurora Elizabeth Lucia (Allegra, Sebastian & Giacomo)
Bridget Abigail
Cecily Leonora (George Lionel & twins: Scarlet Eleanor & Oscar Edward)
Edith Nellie Ruth (Monty William Charles)
Evangeline Mary
Georgiana Lucy Mukuka Lisabet
Iva Elizabeth Julianna
Jayne Dorothy (James Duncan, Grant Edward & Grace May)
Mary Jane Cowley
Minna Wren
Olivia Audrey Sophia
Scarlet Theodora Monroe (Gray)
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.