An explanation of The Lord Chamberlain's duties
There is a difference between the
Lord Chamberlain (this video) vs
the Lord Great Chamberlain - the position that changed with the change of reign.
The current Lord Carrington is of a similar age to the new king
The previous Lord Chamberlain,the Marquess of Cholmondeley had served a long time 1990-2022!
And either he himself or his eldest son (or most likely both: first he himself (unless he dies before Charles - being 13 years his junior - and after his death, his son - who will turn 13 next month) will serve king William when he becomes king.
For those wondering about the intricacies of this office (in terms of who fulfills this role). As it was said, the role moves between different branches of one family: Peregrine Bertie, 3rd Duke of Ancaster and Kesteven, is their common ancestors. As he had only daughters instead of the office going to his eldest son it was equally divided among all (2) daughters. That same principle is still applied. The office goes to the eldest son OR to all daughters equally (meaning they have to share the office when it is their branch's turn). The Cholmondoley branch (descendants of the younger daughter: Georgiana Cholmondeley, Marchioness of Cholmondeley) has only 1 'heir' to the office as they've had a strict male-line inheritance, however, the branch stemming from the elder sister (Priscilla Bertie, 21st Baroness Willoughby de Eresby) has many different branches within it with different parts of the share.
So, let's try to get the more complicated one straight.
Priscilla Bertie, 21st Baroness Willoughby de Eresby: 1/2 (her sister had the other half)
Her eldest son Peter Bertie : 1/2
His eldest son Peter Drummond-Burrell, 22nd Baron Willoughby de Eresby: 1/2 --> however, this son died without (legitimate) children so it passed on to both his sisters who each inherited 1/4 share.
(so, these two branches now have alternate one branch was serving king George VI and the other will now be serving king Charles III - it will be the 'George VI-branch that will also serve George VII)
SUB-BRANCH 1: ELDER SISTER Clementina Drummond-Willoughby, 24th Baroness Willoughby de Eresby: 1/4 (this branch served king George VI)
Pretty straight-forward from here on until now: male-line inheritance except for the final one (her younger brother went missing - she was the only other child). The current 'shared-office holder' for her branch is:
Jane Heathcote-Drummond-Willoughby, 28th Baroness Willoughby de Eresby: 1/4.
Her grandfather and father served king George VI. It is unlikely that she herself will serve king George VII as she is 87 now. As she is unmarried and without issue, her 1/4 share will pass on to the male-line descendants of her two late aunts who will each receive 1/8 share:
Eldest late aunt: Lady Catherine Mary Heathcote-Drumond-Willoughby (1906–1996) --> current heir:
Sebastian St Maur Miller (b. 1965) (her grandson) (but given his age, it seems unlikely that he will outlive William,
so most likely his son Merlin Miller (most likely in his late 20s as his parents married in 1991) will serve king George VII as Lord Great Chamberlain one day).
Younger late aunt: Lady Priscilla Heathcote-Drumond-Willoughby (1909–2002) --> current heir: Sir John Aird, 4th Baronet (b. 1940) (her son); he will pass his share on to his only son: James John Aird, Esq. (born 12 June 1978) - his descendants will have to wait four more reigns (after George VII) to serve as Lord Chamberlain (assuming they decide to alternate between these two sub-subbranches).
SUB-BRANCH 2: YOUNGER SISTER Charlotte Augusta Carrington, Lady Carrington: 1/4 (this branch started serving Charles III last week - and is the most complicated one: but they didn't pick one of the shareholders but chose Rupert Carington, 7th Baron Carrington - the most senior descendant in male-line instead). They last served under George V.
Charlotte passed her 1/4 share on to her son Charles Wynn-Carington, 1st Marquess of Lincolnshire.
Charles (who served king George V!) passed his 1/4 share on to his 5 daughters as his only son died in World War I without heirs - so all ended up with 1/20th share of the office:
2A: Marjorie Wilson, Baroness Nunburnholme
2B: Lady Alexandra Llewellen Palmer
2C: Ruperta Legge, Countess of Dartmouth
2D: Judith Keppel, Countess of Albemarle (it went straight to her son as she passed away before her father)
2E: Lady Victoria Weld-Forester
2A/Marjorie Wilson passed her share on to her son: Charles Wilson, 3rd Baron Nunburnholme 1/20
Charles Wilson passed his share on to his son: Ben Wilson, 4th Baron Nunburnholme 1/20
Ben Wilson passed his share on to his four daughters. One of them recently died so the remaining three now each have 1/60 of the share:
2Aa: The Hon. Lorraine Wilson 1/60
2Ab: The Hon. Tatiana Dent 1/60
2Ac: The Hon. Ines Garton 1/60
2B/Lady Alexandra Llewellen Palmer passed her share on to her son: Brig. Anthony Llewellen Palmer 1/20
Brig. Anthony Llewellen Palmer passed his share on to his nephew (by his younger brother) 1/20
Julian Llewellen Palmer passed his share on to his son 1/20
Nicholas Llewellen Palmer 1/20
2C/Ruperta Legge passed her share on to 5 daughters - who each passed it on in male line 1/20
2Ca Lady Mary Findlay --> Cdr Jonathan Findlay --> Christopher Findlay 1/100
2Cb Lady Elizabeth Basset --> Bryan Basset --> David Basset --> Michael James Basset (brother) 1/100
2Cc Lady Diana Matthews --> Col James Hamilton-Russell 1/100
2Cd Lady Barbara Kwiatkowska --> Jan Witold Kwiatkowski 1/100
2Ce Josceline Chichester, Marchioness of Donegall --> Patrick Chichester, 8th Marquess of Donegall 1/100
2D/son of Judith Keppel: Derek Keppel, Viscount Bury passed his share on to his son 1/20
Rufus Keppel, 10th Earl of Albemarle 1/20
2E/Lady Victoria Weld-Forester (previously married to Lt. Nigel Legge-Bourkewho was killed in action during WW1 - Willam & Harry's nanny is one of their descendants!)) passed her share on to her son 1/20
Sir Henry Legge-Bourke passed his share on to his son 1/20
William Legge-Bourke passed his share on to his son 1/20
Capt. Harry Legge-Bourke 1/20
See the family tree with all these shares on wikipedia.