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:
Albie Oliver Bewley (Milo Denis)
Alfred Lionel
Alfred "Freddie" Theodore (Eleanor Alice "Ella"; half-sibs: Rosie, Ollie & Oscar)
Arthur Michael Clarence
Efan Moses (Idris William)
Felix George Anthony
Frederick Lloyd (Oscar Logan)
George "Geordie" David Fraser (Allegra Kitty Frances, Honor Posy Elizabeth & Louis Merlin Leo)
Jasper Peter Finn
Jordi Indigo Eissa Menzies (Phoenix)
Jude Isaac
Sebastian Raife Maxwell (Beatrice Wren Sophia & Tobias Grey Atthill)
Taidgh Theodore Ogilvie (Fia)
Girls:
Anoushka Annabel Sarika (Reyaan)
Eleanor Dorothy Alice (half-sibs: Alexander "Alex" George Sebastian & Daniel Francis William)
Lila Alice (Angus Michael Alastair)
Marina Ava Soraya (Aurora Marina Lilah)
Twins:
Alba Ottilie & Rose Isla
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.