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:
Balthazar Louis Raphael
Fergus Arthur Shannon
Frederick
Frederick "Freddie" Rowland
Frederick Walter Francis (Grace Elizabeth)
Giles Lorenzo Octavian (Celeste)
George
Henrick-Eamonn Roland (Hari, Hannah, Nick, James & Rachel)
Jamie Paul John
Kit
Laurie
Maximilian James Bennett (Zachary, Sebastian & Rafferty)
Robin Cameron Sladen
Theodore Arthur
Girls:
Aphra Nicola Frances (Theo)
Ava Grace Marina
Clementine Annie Willow
Josephine Daphne Rose ((Joshua Richard) Hugo)
Martha Jean Catherine
Matilda Caroline Louise (Georgina Elisabeth Nella)
Maude Madeleine (Aurelia Amo & Sadie)
Sophia Catherine Helena (William John Anthony)
Twins:
Isla Frances & Olivia Sarah
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.