I don't think you are McAulay, I have wondered that, I can only assume that it is because he isn't really related to Miss Marple but to Sir Henry Clithering and just calls Miss Marple Aunt Jane and the Producers for got that he does call her Aunt.

I need to check the books, but I don't know when in the actual novels that Inspector Craddock starts referring to her as "Aunt Jane," since he meets her for the first time in "A Murder is Announced." As I see it, there are two solutions: 1) The term "Aunt" is strictly a term of endearment and respect. 2) One of Craddock's relatives married one of Miss Marple's relatives, making them aunt and nephew by marriage!

According to the BBC Radio 4 adaptation, Inspector Craddock says that he calls her 'Aunt Jane' as "it's just my nickname for her - she's saved me from making a fool of myself many a time"...

In the Joan Hickson version, Miss Marple and Inspector Craddock meet first in A Murder Is Announced.  Then in the same TV movie series, in The Mirror Crack'd From Side To Side, he tells Inspector Slack, "She's my aunt", and calls her "Aunt Jane" throughout.  At the end of the feature, Raymond refers to Dermot Craddock as "Cousin Dermot".

In the book, A Murder Is Announced, it is mentioned very early that Dermot Craddock is actually the godson of Sir Henry Clithering.  Since Jane Marple has a habit of collecting unrelated nieces and nephews, and since she and Sir Henry had been such good friends for many years, I think the writers of the TV movies took a bit of liberty and let Dermot and Miss Marple, as well as Raymond, "adopt each other".    Miss Marple, as well as other characters in her many mysteries, seem to form bonds of relationship even when blood ties are absent or when they are quite distant.  Not having children or grandchildren of her own, she happily accepts others into her heart, thereby, having many non-blood-related nieces, nephews, godchildren, and cousins.

But I thought Raymond was her Nephew

WINNEBAGO1901

But I thought Raymond was her Nephew

Don't worry, you're not losing your mind, Raymond IS Jane Marple's nephew.  It's assumed he must be her sister's son, since the only sibling of hers even mentioned in the books is her sister (unnamed).

When I said Dermot and Miss Marple, as well as Raymond "adopt each other", I meant Dermot and Jane "adopted" each other as nephew and aunt, and Dermot and Raymond probably "adopted" each other as cousins, considering the close relationship between Jane and Dermot and thereby, Raymond.

See?  Confusing, isn't it?  Anyway, it's been long understood that at least Raymond West was Jane Marple blood nephew.

That would make sense as in the JH version of Carribeam Murder Raymond is talking to someone at the beginning and although that scene isn't in the book he could quite easily be talking to Dermot.

I did wonder who the conversation was between in that movie.  Of course, it could have been any one of Jane's "adopted" nephews, but it would make sense if it was Raymond and Dermot chatting.

I checked the novel, The Mirror Crack'd From Side to Side, and although Dermot never tells outside sources Jane is his aunt, he definitely calls her "Aunty" and "Aunt Jane" from beginning to end, including at least once calling her "Aunt Jane" in front of others.

In that same novel, we also get a bit of his background.  His mother died when he was "five or six" (in his words).

Yes azm, I have just finished The Mirror Crack'd From Side To Side and started a Topic about it, I did at one point think Raymond could have been talking to Miss Marple's Companion on the Coach Tours in Nemesis but as he wasn't in the Book in that way the idea that Raymond is talking to Dermot is better