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.
Boys:
Albert Miles
Brody Stephen
Cosmo Rafael Brooke
Ethan David
Finley Thomas
George Bernard Noel (Hugo Charles Noel)
Harry Felix
Max Munro (Lucy Anne Christine)
Nathan Robert (Camilla Sloane & Tristan Cryder)
Noah Harvey
Oscar Francis Geoffrey
Oscar Louis Alexander (Rory Andrew William)
Oscar Joseph
Theodore Charles Ernest (William Edmund Alexander & Adam Robert Henry)
Toby Arthur Kelson
Girls:
Aurelia Araminta
Clementine (Felix)
Eloise Susanna
Freya Natasha (Freddie)
Marnie Aitana
Mia Sienna
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.