Is there an expression like "gosh" that a stereotypical upper-class British character would say for expressing surprise?
I've thought of "parbleu", but it being a loan word from French, it doesn't sound right as a stereotypical English expression.
I would avoid "My Lord" because of possible moral implications with the reader.
Note: it should be easily recognisable by a non-English audience.
Is there such an expression? Thanks!