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:
Aaron Aarav Duggie (Kyle Arjun Mahendra)
Alfie Sonny
Charlie Thomas
Fraser Laurence James (Isla Nancy Gail)
Frederick Robert
Henry Charles Robert
Jasper George
Kenneth Francois
Miller
Orlando Dare Fiteni
Otis Blaize Joseph
Rory Mark Arthur
Theo Alexander
Theodore Charles
Girls:
Arabella Elizabeth Ann
Beatrice Coco
Clova Isobel Lucia (William "Billy" Minto Myles)
Eleanor Ivy
Eloise Christina Maree (Sean)
Sadie Florence
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.