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:
Alfred Richard Henry
Archie Philip William
Ernest Sydney Charles (Octavia Dorothy Alice)
Frederick William Arthur
Hector John Douglas (Margot Violet Elizabeth)
Henry Matthew (Molly Elizabeth)
James Edward (Isabella)
Ludo Tiago Thor
Otto Fen Odin (Hector & Jasper)
Thomas (Tallulah Grace)
Girls:
Cleo Isobel Loveday (Nina Penelope Mary)
Hallie Isabelle Mary (Elliott Andreas)
Harper Elizabeth May
Helena Isabel (Nicholas Andrew & Martha Clare)
Mari-Ann
Nyra Kaur
Poppy Florence (Ottilie Mabel)
Poppy Olivia Florence (Henry & Alfred George Balfour)
Sarah Juliet (Benjamin & Elizabeth)
Zoe Meadow (Jos & Evan)
Twins:
Edgar "Teddy" William Bodley & Albert "Bertie" John Bagshawe (Martha Josephine Mildred)
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.