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 John
Benjamin Westby Vavasour
Jack Timothy Robert
Monty Otto Edward (Beatrix Coco Hester)
Ralph Marceau (Edgar & Théodore)
Rex Jonathan Lewis
Roland Rupert William (Eliza Henrietta Charlotte)
Rónan John Michael
Rory Cyprian Paul (Matilda Iris Rosina & Poppy Beatrix Rose)
Theodore James Alexander (Amelia & Felicity)
Wilfred (Felix & Clementine)
William Gabriel Beau (Maxim)
Girls:
Charlotte Ann
Felicity Isabella
Isla Rose (Rory)
Maisie Emma Patricia
Nina Rainey
Ophelia Rose Tigerlily (Theon Maddox Bastian)
Rose Aurelia (Isabella Margot)
Saoirse Elsie Elizabeth
Sophia Rose Anne (Livia Jill Prideaux)
Twins:
Alfie Raymond & Monty Robin
Beatrix Cecilia Alice & Florence Henrietta Coco (Arthur Charles North & Rose Beatrice Elizabeth)
Bertram Alexander Holt & Florence Maria Teresa (Matilda Emmeline Kennedy)
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.