|Sir Osmond Darling-Blackadder|
|Occupation||Keeper of the Queen's Lawnsprinkler|
|First appearance||The Royal Gardener|
|Last appearance||Jubilee Girl|
|Played by||Rowan Atkinson|
Sir Osmond Darling-Blackadder, Keeper of the Queen's Lawnsprinkler. He expressed extreme displesure in the then upcoming Queen's Jubilee.
- His name suggests that he's a member of both the Blackadder family and the Darling family.
- Sir Osmond is the first and only member of the Darling family, who isn't portrayed by Tim McInnerny.